Which statement about fossil fuels is true?
_____________________________________
(any wrong/spams answers will be reported)
_____________________________________

(A) They are found deep within the earth.

(B) They do not cause pollution.

(C) They are renewable.

Answers

Answer 1

Explanation:

• they are found deep within earth

Answer 2

Answer:

A

Explanation:

fossil fuels are remains of dead plants and animals. so, they are found underground


Related Questions

What is the molar ratio of carbon dioxide to oxygen in the equation below?
C2H4 + 3O2 → 2CO2 + 2H2O

Answers

This means that for every 2 moles of carbon dioxide produced, 3 moles of oxygen are consumed. Conversely, for every 3 moles of oxygen consumed, 2 moles of carbon dioxide are produced.

What is Molar Ratio?

The molar ratio is a term used in chemistry that describes the ratio between the number of moles of one substance in a chemical reaction to another substance in the same reaction.

In a balanced chemical equation, the coefficients that are written in front of each reactant and product represent the relative numbers of moles of each substance that are involved in the reaction. The molar ratio is simply the ratio of the coefficients of any two substances in the reaction

The balanced chemical equation is:

C2H4 + 3O2 → 2CO2 + 2H2O

From this equation, we can see that the molar ratio of carbon dioxide (CO2) to oxygen (O2) is 2:3.

It's important to note that the molar ratio is based on the coefficients of the balanced equation, which represent the relative number of molecules or moles of each substance involved in the reaction. The molar ratio can be used to calculate the amount of reactants or products involved in the reaction, given the amount of one of the substances.

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You fill a rigid steel cylinder that has a volume of 10.0 L with 20. moles of nitrogen gas at 331 ºK. What is the final pressure in kPa in the cylinder?

Answers

To determine the final pressure in kPa in the cylinder, we can use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (8.31 J/mol*K), and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15 to it.
So, the temperature T = 331 + 273.15 = 604.15 K

Next, we can calculate the final pressure using the ideal gas law equation.
n = 20.0 moles
V = 10.0 L
T = 604.15 K
R = 8.31 J/mol*K

Plugging the values into the ideal gas law equation, we get:
P = (nRT) / V
P = (20.0 mol * 8.31 J/(mol*K) * 604.15 K) / 10.0 L
P = 10,006.9 Pa
P = 10.01 kPa (rounded to two decimal places)

Therefore, the final pressure in kPa in the cylinder is 10.01 kPa.

What is the overall equation for the reaction that produces NaCl and O2 from Na2O and Cl2?

Upper N a subscript 2 upper O (s) plus upper C l subscript 2 (g) right arrow upper N a upper C l (s) plus upper O subscript 2 (g).

2 upper N a subscript 2 upper O (s) plus upper C l subscript 2 (g) right arrow 2 upper N a upper C l (s) plus upper O subscript 2 (g).

2Upper N a subscript 2 upper O (s) plus 2 upper C l subscript 2 (g) right arrow 4 upper N a upper C l (s) plus upper O subscript 2 (g).

Answers

2 Na2O (s) + 2 Cl2 (g)  4 NaCl (s) + O2 is the general equation for the reaction that generates NaCl and O2 from Na2O and Cl2. (g).

What is the general equation for the NaCl-producing reaction?

The interaction of sodium with chlorine (Cl) to form sodium chloride is an illustration of a synthesis reaction. (NaCl). The chemical formula for this reaction is 2Na + Cl2 2NaCl.

What happens when NaCl oxidizes?

Sodium is oxidised (its oxidation number grows from 0 in Na to +1 in NaCl) and chlorine is reduced (its oxidation number reduces from 0 in Cl2 to 1 in NaCl) sodium chloride is created when these two elements react.

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Calculate the value of the equilibrium constant, Ksp, for silver carbonate, Ag2CO3 if the molar solubility of Ag2CO3 is 1.28 x 10^ -4 M.

Answers

The value of the equilibrium constant, Ksp, for silver carbonate (Ag2CO3) is 2.07 x 10^-11.

What is solubility product?

The solubility product constant (Ksp) is a measure of the solubility of a sparingly soluble salt. For silver carbonate (Ag2CO3), the equilibrium expression for its dissolution in water is:

Ag2CO3(s) ⇌ 2Ag+(aq) + CO3^2-(aq)

The corresponding equilibrium constant expression for the reaction is:

Ksp = [Ag+]^2[CO3^2-]

where [Ag+] and [CO3^2-] are the molar concentrations of silver ions and carbonate ions in the solution, respectively.

We are given the molar solubility of Ag2CO3, which is 1.28 x 10^-4 M. This means that when Ag2CO3 dissolves in water, it dissociates to form 2Ag+ ions and 1 CO3^2- ion. Therefore, we can assume that the initial molar concentration of Ag+ and CO3^2- in the solution are also 1.28 x 10^-4 M.

Substituting these values into the Ksp expression, we get:

Ksp = [Ag+]^2[CO3^2-] = (1.28 x 10^-4 M)^2(1.28 x 10^-4 M) = 2.07 x 10^-11

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How many moles of CO2 are PRODUCED if 6.0 moles O2 are used?

Answers

Answer:

6 mol CO2

Explanation:

According to the equation, 6 moles of O2 will produce 6 moles of CO2, so the ratio is 1:1

therefore 6 moles of O2 will produce 6 moles of CO2

If you can answer it with another sheet answering all that I would appreciate it.

Answers

Answer:

1- volume of balloon = 0.46949 L
2- volume = 0.71399 L
3- V = 0.28510 L = 285.102 mL
4- V = 1.80537 L

Explanation:
It's all about Charles' law

Charles' law: The volume of an ideal gas is directly proportional to the absolute temperature AT CONSTANT PRESSURE.

then, we conclude that:

[tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]

in which V1 : initial volume in Liters, T1: initial temperature in Kelvin, V2: final volume in Liters, T2: final temperature in Kelvin.

*Temperature in Kelvin = Temperature in Celsius + 273

in Q1:

[tex]\frac{0.5}{22+273} =\frac{V_{2} }{4+273}[/tex]

[tex]V_{2} = \frac{0.5(4+273)}{22+273} = 0.46949 L[/tex]

in Q2:

[tex]\frac{0.4}{293} = \frac{V_{2}}{523}[/tex]

[tex]V_{2} = \frac{523 * 0.4 }{293} = 0.71399 L[/tex]

in Q3:

[tex]\frac{0.25}{292} = \frac{V_{2}}{333}[/tex]

[tex]V_{2} = \frac{333*0.25}{292} = 0.285102 L = 285.102mL[/tex]

in Q4:

[tex]\frac{2}{298} = \frac{V_2}{269}[/tex]

[tex]V_2 = \frac{2*269}{298} = 1.80537 L[/tex]


Who makes the best explanation and why?

Answers

A gas is considered to be inactive if, under a specific set of circumstances, no molecular interactions occur.

What is inert gas?

A gas is considered to be inert if it does not easily experience chemical interactions with other chemicals and does not easily produce chemical compounds as a result. The noble gases, formerly known as the neutral gases, frequently do not combine with a wide variety of substances. Inert gases are typically used to prevent unintended chemical reactions from deteriorating a sample.

The oxygen and wetness in the air cause these unwanted chemical reactions, which are frequently oxidation and hydrolysis reactions. Because several of the noble gases can be made to respond under specific circumstances, the word "inert gas" is context-dependent. The most widely used inert gas is purified argon gas because of its large natural abundance (78.3% N2, 1% Ar in air) and cheap relative expense.

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Calculate the grams of O2 required for the combustion of 25.9 g of ethylcyclopentane

Answers

To calculate the grams of O2 required for the combustion of 25.9 g of ethylcyclopentane, we need to first write the balanced chemical equation for the combustion of ethylcyclopentane:

C11H20 + 15O2 → 11CO2 + 10H2O

From the balanced equation, we can see that 15 moles of O2 are required to react with 1 mole of C11H20.

To calculate the grams of O2 required, we can use the following steps:

1. Calculate the number of moles of C11H20:

moles of C11H20 = mass of C11H20 / molar mass of C11H20
moles of C11H20 = 25.9 g / 140.28 g/mol
moles of C11H20 = 0.1847 mol

2. Calculate the number of moles of O2 required:

moles of O2 = 15 moles of O2 / 1 mole of C11H20 * 0.1847 moles of C11H20
moles of O2 = 2.7705 moles

3. Calculate the mass of O2 required:

mass of O2 = moles of O2 * molar mass of O2
mass of O2 = 2.7705 mol * 32.00 g/mol
mass of O2 = 88.97 g

Therefore, the grams of O2 required for the combustion of 25.9 g of ethylcyclopentane is 88.97 g.

Mg(OH)2 + 2HCl → 2H(OH) + MgCl2



How many moles of water are produced by the reaction of magnesium hydroxide, Mg(OH)2, and 9.8 moles of hydrochloric acid, HCl?

Answers

Answer:

Looking at the balanced chemical equation:

Mg(OH)2 + 2HCl → 2H2O + MgCl2

We can see that for every 2 moles of hydrochloric acid (HCl) that react, 2 moles of water (H2O) are produced.

Therefore, if 2 moles of HCl produce 2 moles of H2O, then 9.8 moles of HCl will produce:

(9.8 mol HCl) x (2 mol H2O/2 mol HCl) = 9.8 mol H2O

So, 9.8 moles of hydrochloric acid reacting with magnesium hydroxide will produce 9.8 moles of water.

Explanation:

Guys, who can help with completing this table if the molecular weight of bovine caseine is 24891, and 1g of milk powder which where used to make milk solution contains 0.349 g of proteins, 80% of which is casein. Can you briefly explain the calculation for concentration of casein and hydrolysed casein if possible.

Answers

Therefore, the concentration of casein in the milk solution is approximately 1.121 × 10⁻⁵ mol/L.

What is concentration?

Concentration is a measure of the amount of a substance present in a given volume or mass of a solution or mixture. It is usually expressed in units of mass per unit volume (e.g. g/L), moles per unit volume (e.g. mol/L), or percentage by mass or volume (e.g. % w/v or % v/v). Concentration is an important concept in chemistry, biochemistry, and many other fields. It allows us to quantify the amount of a substance present in a solution or mixture, and to compare the concentrations of different substances. It is also used to determine the stoichiometry of chemical reactions, to calculate reaction rates, and to monitor the progress of chemical reactions. In general, the concentration of a substance depends on the amount of the substance and the volume or mass of the solution or mixture. Thus, concentration can be changed by adding or removing a substance, or by changing the volume or mass of the solution or mixture.

Here,

First, let's calculate how much casein is in the 1 g of milk powder:

80% of 0.349 g = 0.2792 g of casein

Next, let's calculate the concentration of casein in the milk solution. We'll assume that the milk solution is made by dissolving the 1 g of milk powder in water to make a total volume of 100 mL (or 0.1 L) of solution:

Concentration of casein = mass of casein / volume of solution

Mass of casein = 0.2792 g

Volume of solution = 0.1 L

Concentration of casein = 2.792 g/L or 2.792 mg/mL

Finally, let's calculate the concentration of hydrolyzed casein, which we'll assume is completely broken down into its constituent amino acids. The molecular weight of casein is 24,891 g/mol, so the molecular weight of each amino acid is approximately 110 g/mol (since casein is about 80% amino acids). Therefore, we can estimate that the molecular weight of hydrolyzed casein is about 110 g/mol:

Concentration of hydrolyzed casein = concentration of casein * (molecular weight of casein / molecular weight of hydrolyzed casein)

Concentration of casein = 2.792 mg/mL

Molecular weight of casein = 24,891 g/mol

To calculate the concentration of hydrolyzed casein, we need more information about the degree of hydrolysis of the casein. If we know the percentage of the casein that has been hydrolyzed, we can calculate the concentration of hydrolyzed casein using a similar approach as above.

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Write out the equilibrium constant expressions for the following reaction: H20 + C02 (g) → H2C03 (aq)

Answers

Answer:

Step 1/2

First, we need to write the balanced chemical equation for the reaction: H2O(l) + CO2(g) → H2CO3(aq)

Step 2/2

Next, we can write the expression for the equilibrium constant, Kc, which is defined as the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients: Kc = [H2CO3] / ([H2O][CO2]) Therefore, the correct answer is 3. Kc = [H2CO3]^2/[H2O][CO2].

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Final answer:

The equilibrium constant expression for the reaction: H2O + CO2 (g) → H2CO3 (aq) is represented as [H2CO3] / ([H2O][CO2]). The concentration of water is usually omitted as it is a pure liquid.

Explanation:

The equilibrium constant expression for the given reaction: H2O + CO2 (g) → H2CO3 (aq) is often represented as the ratio of the concentrations of the products to the reactants, raised to the power of each concentration's stoichiometric coefficient. In this case, the expression for the equilibrium constant (Kc) would be: [H2CO3] / ([H2O][CO2]). Note that the concentration of water is not generally considered in the expression since water is a pure liquid.

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Calculate [OH-} from A solution in which [H+] is 1000 times greater than [OH−] .

Answers

The hydrogen ion has a concentration of 1000 times more than the hydroxide ion, which has a concentration of 3.1623× 10^9 M.

How to calculate concentration?

Assume that x is the hydroxide ion concentration.

x=[OH−]

If the hydrogen ion is 1000 times more abundant, then [H+]=1000x (x)=1.010^14x^2=1.010^14

1000x=√1.010^14

1000x=3.162310^9

[OH] =3.1623×10^9 M

Hence, 3.1623 10^9 M of hydroxide ions are present.

What is autoionization of water?The product of the hydrogen ion concentration and the hydroxide ion concentration, also known as autoionization of water (Kw), has a constant value of 1.01014 and is a measure of the equilibrium between these two ionic concentrations.To create the hydronium ion (H3O+) and the hydroxide ion (OH), a proton is moved from one water molecule to another during the process of autoionization of water. Water's autoionization constant, Kw, can be found in the equilibrium formulation for this process as [H3O+][OH].

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Assume that it was necessary to produce 8 g of copper. How much iron would you have to use?

Answers

We would require 7.07 g of iron to generate 8 g of copper.

What is iron?

It is a common metal in the Earth's crust that is thick, glossy, and silver-gray in color. By mass, iron is the fourth most prevalent metal in the crust of the Earth and the most prevalent element overall.

How do you determine it?

The reaction between copper(II) sulfate and iron is a redox process in which copper(II) ions are reduced to copper metal and iron is oxidized to iron(II) sulfate. The reaction's chemically balanced equation is as follows:

Fe(s) + CuSO4(aq) → Cu(s) + FeSO4(aq)

The balanced equation reveals that the molar ratio of copper to iron is 1:1. Therefore, 1 mole of copper is created for every mole of iron utilized.

We must first convert the mass of copper to moles, and then apply the mole ratio to determine how many moles of iron are required to generate 8 g of copper.

Copper has a molar mass of 63.55 g/mol. As a result, the amount of copper produced is:

8 g / 63.55 g/mol = 0.126 moles

Since iron and copper have a mole ratio of 1:1, we require as many moles of iron as we do with copper:

0.126 moles of Cu = 0.126 moles of Fe

Iron has a molar mass of 55.85 g/mol. The required amount of iron is thus:

0.126 moles x 55.85 g/mol = 7.07 g of Fe

Hence, we would require 7.07 g of iron to generate 8 g of copper.

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Check all of the changes that would increase the pressure of a gas?

O transferring the gas to a smaller container

O putting the gas sample in the freezer

O adding a separate, non-reactive gas to the container

O holding the container over Bunsen burner

O Expanding the container

Answers

Moving a gas to a smaller container and holding the container over a Bunsen burner are two modifications that might raise a gas's pressure.

What would make a gas in a container pressurize more?

Gas pressure rises as container volume decreases. As a gas's temperature rises inside a rigid container, pressure also rises. The temperature, volume, and particle count of an enclosed gas are all variables that determine its pressure.

How can the air pressure within a container be raised?

We can modify the pressure in two ways. First, we can make the air denser by either decreasing the volume of the container or adding additional air molecules to it.

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Nuclear reactions can be affected (slowed down/sped up) by: (HINT: do
they behave like conventional chemical reactions?)
Temperature
Pressure
Catalysts
All of the above
None of the above
1 point

Answers

Nuclear reactions can be affected  by temperature.

option A.

What factors affect nuclear reaction?

Temperature can affect nuclear reactions by increasing the kinetic energy of the particles, which can result in more collisions and a higher likelihood of nuclear reactions occurring.

Pressure does not directly affect nuclear reactions, as they primarily involve the nucleus of an atom and not the electrons or other components of the atom that are influenced by pressure.

Catalysts are not typically involved in nuclear reactions, as they involve changes to the nucleus of an atom and not the chemical reactions that catalysts typically affect.

Therefore, the correct answer is A, temperature.

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Determine the mass of oxygen in a 6.3- g

sample of Al(NO3)3

Answers

Al(NO3)3 sample of 6.3 g has an oxygen mass of 7.20 g.

What is meant by mass of oxygen?A colorless, flavorless, and odorless gas called oxygen is vital to all living things. Animals absorb it and then convert it to carbon dioxide, which plants then use as a source of carbon and release back into the atmosphere.Oxygen is the name of the chemical element that has the letters O and the atomic number 8. It is a highly reactive nonmetal that is a member of the periodic table's chalcogen group and easily reacts with most elements as well as other substances to form oxides.With 8 neutrons and 8 protons in its nucleus, oxygen-16 (16O) is a stable isotope of oxygen. 15.99491461956 u is its mass.

Simply base your solution on the chemical formula provided because a chemical reaction is not provided.

Molar mass of Al2(SO4)3 = 342.15 g/mol

7.20 g Al2 (SO4)3 (1 mol/342.15g) (3mol O/2 mol Al) (1 mol O2/1/2 mol O2) (32g O2/1mol O2) = 4.04 g O2

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What is the pH of a solution resulting from 5.00 mL of 0.011 M HCl being added to 50.00 mL of pure water?

Answers

Answer:

Assuming that the addition of 5.00 mL of 0.011 M HCl to 50.00 mL of pure water does not significantly affect the volume of the solution:

Calculate the number of moles of HCl added:

moles HCl = concentration x volume = 0.011 mol/L x 0.00500 L = 5.50 x 10^-5 mol

Calculate the total volume of the solution:

total volume = 50.00 mL + 5.00 mL = 55.00 mL = 0.055 L

Calculate the concentration of H+ ions in the solution:

[H+] = moles HCl / total volume = 5.50 x 10^-5 mol / 0.055 L = 1.00 x 10^-3 M

Calculate the pH of the solution:

pH = -log[H+] = -log(1.00 x 10^-3) = 3.00

Therefore, the pH of the solution is 3.00.

Explanation:

In the electrolysis of aluminium chloride, 10A of electricity was passed for 96.5sec. Calculate the mass in gram of aluminium deposited [Al 27, C1=35.5, F = 96500C] (a) 0.21 (b) 0.09 (c) 0.27 (d) 0.45. ​

Answers

The mass in gram of aluminum deposited (c) 0.27 g.

Steps

The balanced chemical equation for the electrolysis of aluminum chloride is:

2 AlCl3 → 2 Al + 3 Cl2

From this equation, we can see that 2 moles of Al will be produced for every 2 moles of AlCl3 consumed. The molar mass of Al is 27 g/mol, so the mass of Al produced can be calculated using the following formula:

mass of Al = (current × time × molar mass of Al) / (3 × Faraday's constant)

where the current is in amperes, time is in seconds, Faraday's constant is in coulombs per mole of electrons (F = 96500 C), and the factor of 3 in the denominator comes from the stoichiometry of the reaction.

Plugging in the values given in the problem, we get:

mass of Al = (10 A × 96.5 s × 27 g/mol) / (3 × 96500 C/mol) = 0.27 g

Therefore, the answer is (c) 0.27 g.

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i need help please!!!!

Answers

Answer:

we need 19.52 g of sugar to produce 10 g of ethanol.

Explanation:

The balanced chemical equation for the fermentation of glucose (sugar) to ethanol (C2H5OH) is:

C6H12O6 → 2C2H5OH + 2CO2

From the equation, we can see that one mole of glucose (C6H12O6) reacts to produce two moles of ethanol (C2H5OH). To determine how many grams of sugar are needed to produce 10g of ethanol, we need to use stoichiometry and the molar mass of glucose.

The molar mass of glucose is 180.16 g/mol, and the molar mass of ethanol is 46.07 g/mol. Therefore, we can calculate the number of moles of ethanol produced from 10 g as follows:

moles of C2H5OH = mass / molar mass = 10 g / 46.07 g/mol = 0.217 moles

Since two moles of ethanol are produced from one mole of glucose, we can calculate the number of moles of glucose needed as follows:

moles of glucose = 0.217 moles / 2 = 0.1085 moles

Finally, we can calculate the mass of glucose needed as follows:

mass of glucose = moles of glucose × molar mass of glucose

mass of glucose = 0.1085 moles × 180.16 g/mol

mass of glucose = 19.52 g

[tex] \:\:\:\:\:\: \sf \underline{\pink{C_6H_{12}O_6} \longrightarrow \pink{2\:C_2H_5OH}+2CO_2}\\[/tex]

As per this equation, 1 mole of [tex]\sf C_6H_{12}O_6 [/tex] produces 2 moles of [tex]\sf C_2H_5OH[/tex] and 2 moles of [tex]\sf CO_2[/tex]

Molar mass of 1 mole of [tex]\sf C_6H_12O_6 [/tex]-

[tex] \:\:\:\:\:\:\longrightarrow \sf Molar\: Mass_{( C_6H_{12}O_6 )} = 12\times 6 + 1\times 12 + 16 \times 6\\[/tex]

[tex] \:\:\:\:\:\:\longrightarrow \sf Molar\: Mass_{( C_6H_{12}O_6 )} =\underline{180 \:grams }\\[/tex]

Molar Mass of 2 moles of [tex]\sf C_2H_5OH[/tex]-

[tex] \:\:\:\:\:\:\longrightarrow \sf Molar \:Mass _{( C_2H_5OH)} = 2\bigg(12 \times2 + 1\times 5 + 16 +1\bigg)\\[/tex]

[tex] \:\:\:\:\:\:\longrightarrow \sf Molar \:Mass _{( C_2H_5OH)} =2\times 46 \\[/tex]

[tex] \:\:\:\:\:\:\longrightarrow \sf Molar \:Mass _{( C_2H_5OH)} =\underline{92\: grams }\\[/tex]

As per equation, 92 grams of [tex]\sf C_2H_5OH[/tex] can be produced from 180 grams of sugar. So, for making 10 grams of [tex]\sf C_2H_5OH[/tex],we have to multiply 180 by 10 and then divide by 92. 180 grams of sugar is needed to make 92 grams of ethanol. Therefore -

[tex] \:\:\:\:\:\:\longrightarrow \sf \dfrac{180\times 10}{92}\\[/tex]

[tex] \:\:\:\:\:\:\longrightarrow \sf \underline{\pink{19.565 \:grams }}\\[/tex]

19.565 grams of sugar will be needed to make 10 g [tex]\sf C_2H_5OH[/tex]

Compare an ionic bond and a molecular bond.

Answers

Answer:

As a general rule of thumb, compounds that involve a metal binding with either a non-metal or a semi-metal will display ionic bonding. Compounds that are composed of only non-metals or semi-metals with non-metals will display covalent bonding and will be classified as molecular compounds.

1. What is the molarity of a solution that contains 0.25 moles of NaOH dissolved in 3.0 Liters solution?​

Answers

The molarity of the solution is 0.0833 M.

What is the molarity of solution?

The molarity (M) of a solution is defined as the number of moles of solute dissolved per liter of solution.

It is the measure of the concentration of any solute per unit volume of the solution.

In this case, we are given that there are 0.25 moles of NaOH dissolved in 3.0 liters of solution.

To find the molarity, we divide the number of moles by the volume in liters:

Molarity = moles of solute / volume of solution

Molarity = 0.25 moles / 3.0 L

Molarity = 0.0833 M

Therefore, the molarity is 0.0833 M.

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What is the wavelength of a yellow light with a frequency of 5.2 x 10¹⁴ Hz?

[?] × 10[?] m
c = 3.0 x 10^8 m/s

Answers

Taking into account the definition of wavelength, frecuency and propagation speed, the wavelength of a yellow light with a frequency of 5.2×10¹⁴ Hz is 5.77×10⁻⁷ m.

Definition of wavelength

The length of a wave is the spatial period of the wave, that is, the distance at which the waveform repeats itself. Two consecutive points that have the same phase are normally considered: two maximums, two minimums, two zero crossings (in the same direction).

This is, wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Definition of frequency

Frequency is a measure of the number (amount of cycles) of waves generated in a unit of time. Its unit is s⁻¹ or hertz (Hz).

Definition of propagation speed

The propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.

The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:

v = f×λ

All electromagnetic waves propagate in a vacuum at a constant speed of 3×10⁸ m/s, the speed of light.

Wavelength of a yellow light

In this case, you know:

v=3×10⁸ m/sf= 5.2×10¹⁴ Hzλ= ?

Replacing in the definition of propagation speed:

3×10⁸ m/s= 5.2×10¹⁴ Hz× λ

Solving:

λ= 3×10⁸ m/s ÷ 5.2×10¹⁴ Hz

λ= 5.77×10⁻⁷ m

In summary, the wavelength of the yellow light is 5.77×10⁻⁷ m.

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Calculate the volume of 0.1M ammonia which could be obtained by heating 2.7g of ammonium chloride with excess sodiumhydroxide and absorbing all the ammonia evolved.​

Answers

The volume of 0.1 M ammonia obtained from the reaction is 0.504 L.

To solve this problem

The balanced chemical equation for the reaction between ammonium chloride and sodium hydroxide is:

NH4Cl + NaOH → NaCl + H2O + NH3

From the equation, we can see that 1 mole of ammonium chloride produces 1 mole of ammonia.

First, we need to calculate the number of moles of ammonium chloride present in 2.7 g of NH4Cl:

Molar mass of NH4Cl = 14.01 + 1.01 x 4 + 35.45 = 53.49 g/mol

Number of moles of NH4Cl = mass / molar mass = 2.7 g / 53.49 g/mol = 0.0504 mol

Since the reaction goes to completion and we have an excess of sodium hydroxide, all of the ammonia produced will be absorbed by the 0.1 M solution of the absorber.

The concentration of the ammonia solution can be calculated as follows:

0.1 M = moles of NH3 / volume of NH3 solution (in liters)

moles of NH3 = 0.0504 mol (from above)

Volume of NH3 solution = moles of NH3 / 0.1 M = 0.0504 mol / 0.1 M = 0.504 L

Therefore, the volume of 0.1 M ammonia obtained from the reaction is 0.504 L.

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The chemical formula below shows how salt is produced.
Which substances are the reactants?
HCI and NaCl
NaCl and H₂O
HCI and NaOH
NaOH and H₂O
HCI + NaOH → NaCl + H₂O
K

Answers

The reactants are hydrochloric acid (HCI) and sodium hydroxide (NaOH). The products formed as a result of the reaction are sodium chloride (NaCl) and water (H₂O).

Regarding the other substances mentioned in the question?

NaCl is not a reactant, but rather a compound formed as a product in the reaction between HCI and NaOH. H₂O is not a reactant in the first two reactions mentioned, but it is a product formed in the reaction between NaCl and H₂O, and in the reaction between HCI and NaOH.

What is salt?

salt refers to any ionic compound formed by the reaction between an acid and a base. The term "salt" is used to describe the product of this type of reaction because it often forms crystals with a crystalline structure that is similar to that of table salt (sodium chloride).

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Use the following equation to answer the next question
P₂O5 + 3 H₂O → 2H3PO4
8. If you started the reaction with 55 g.of P₂O5 and 16 g. of H₂O, the H₂Qwould be your
limiting reactant.
How many grams of excess reactant would you have? *The molar mass of P₂O5 is 141.88
g/mol.

Answers

In the event where we began the reaction with 55 g of P2O5 and 16 g of H2O, we would have 12.9 g of extra P2O5.

What does the chemical equation CH4 2O2 -> CO2 2H2O represent when expressed in moles?

CO2 (g) + 2H2O = CH4 (g) + 2O2 (g) (g) We can state that one CH4 molecule reacts with two O2 molecules to form one CO2 molecule and two H2O molecules, or we can say that one CH4 molecule reacts with two O2 molecules to form one CO2 molecule and two H2O molecules.

Moles of P₂O5 needed = 0.888 mol H₂O × (1 mol P₂O5 / 3 mol H₂O) = 0.296 mol P₂O5

Moles of excess P₂O5 = 0.387 mol P₂O5 - 0.296 mol P₂O5 = 0.091 mol P₂O5

To convert moles of excess P₂O5 to grams, we use the molar mass of P₂O5:

Mass of excess P₂O5 = 0.091 mol × 141.88 g/mol = 12.9 g

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Balance the equation using lowest whole-number coefficients.

C12H22O11+O2 --> CO2 +H2O

Answers

Answer:

C12H22O11 + 12O2 --> 12CO2 + 11H2O

Explanation:

C12H22O11 + 12O2 --> 12CO2 + 11H2O

C = 12

H = 22

O = 11 + 24 = 35

The balanced chemical equation is: C12H22O11 + 12 O2 → 12 CO2 + 11 H2O

What is C12H22O11?

C12H22O11 is the chemical formula for sucrose, a disaccharide composed of glucose and fructose monomers linked by a glycosidic bond. Sucrose is commonly known as table sugar and is a common sweetener in food and beverages. It is extracted from sugar cane or sugar beet and is widely used in the food industry.

Is it necessary to balance the equation?

Yes, it is necessary to balance a chemical equation to ensure that the law of conservation of mass is obeyed. This law states that matter cannot be created or destroyed in a chemical reaction but can only be rearranged into different combinations.

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10. Liquids are poured into a container and separate. They form a green layer on
the bottom, a blue layer in the middle, and a red layer on the top. What's true about
the density of the liquids?
A. The red liquid is the least dense.
B. The green liquid is the least dense.
C. The blue liquid is the least dense.
D. They all have the same density.

Answers

That leaves us with options A and C. We know that the red liquid forms the top layer, and if it is less dense than both the green and blue liquids, then option A is correct.

What is Density?

Density is a physical property that describes the amount of mass per unit volume of a substance. It is a measure of how much matter is packed into a given amount of space.

Where mass is the amount of matter in an object and volume is the amount of space that the object occupies.

Based on the information given in the question, we can conclude that the liquids have different densities, with the most dense liquid forming the bottom layer and the least dense liquid forming the top layer. Therefore, option D is ruled out.

Since the green liquid forms the bottom layer, it must be more dense than both the blue and red liquids. Therefore, option B is ruled out.

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Question Pls fast I need the answer!!!
Question number 16

Answers

The correct option is d;  A is false but R is true , Examples include wastewater (sometimes called effluent) released by a manufacturing, an oil refinery, or a wastewater treatment facility, as well as pollution from leaky septic systems, chemical and oil spills, and unlawful dumping.

What type of water pollution is sewage?

Most sewage is liquid waste. It is the waste water created by human activity from places like homes, businesses, hospitals, and workplaces that includes both liquid and solid wastes. Water, which contains dissolved and suspended pollutants, makes up the majority of it. Wastewater arises from typical life processes: bathing, toilet flushing, laundry, dishwashing, etc.

It emanates from home and domestic sources. Commercial wastewater originates from non-domestic sources such beauty parlors, taxidermie, furniture restoration, music instrument washing facilities, and car body shops.

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Full Question ;

The following question consists of two statements- Assertion (A) and Reason (R), An the question by selecting the suitable option given below. Assertion (A): Sewage is the dirty water that is generated by human activities.

Reason (R): Biogas is used to generate electricity.

(a) both A and R are true, and R is the correct explanation of A

(b) both A and R are true, and R is not the correct explanation of A

(c) A is true but R is false.

(D) A is false but R is true

What is the volume of 26 grams of O2 at STP? Show all work.

Answers

Answer:

The molar mass of O2 is 32g/mol.

Explanation:

So the mol amount of these O2 is 56/32=2 mol. STP stands for the standard temperature and pressure which means the temperature is 0 ℃ and pressure is 100 kPa. And the molar volume of gas is 22.7 L/mol under STP. So the answer is 22.7*2=45.4 L

what is allele in organism​

Answers

Answer:

An allele is a variant form of a gene that occurs at a specific location on a chromosome. In other words, it is one of two or more versions of a gene that exist in a population or an individual organism.

Each organism inherits two copies of each gene, one from each parent. The two copies may be the same (homozygous) or different (heterozygous) alleles. The combination of alleles determines the organism's genotype, which in turn influences its phenotype, or observable traits.

Alleles may differ in their effects on the organism, with some being dominant (expressed even in the presence of a different allele) and others being recessive (expressed only in the absence of a dominant allele). The study of alleles and their effects on inheritance is known as genetics, a field that has important applications in medicine, agriculture, and many other areas.

Explanation:

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