Answers
Answer:
I THINK it's D, I could be incorrect, however.
Explanation:
C3H8O, as it is flammable, and thus I wouldn't imagine it being a product of combustion. I could be incorrect, so take my answer with a grain of salt.
Related Questions
What happened to solid materials when mixed with the liquid materials?
Answers
Answer:
the solid materials will disappear after mixing with a liquid material
plsss mark me as brainliest answer plsssssssss
Answer: go fk your dad you fkin whor
Fossil fuels contribute to about 85% of the total energy produced in the world. What is a direct environmental
consequence of the extensive use of fossil fuels?
Answers
Answer:your a poop face
Explanation:
Imagine not knowing the answer
Answer: C
Explanation:
A gas at -20c occupies volume 140 ml calculate temperature at which the volume of the gas becomes 65 ml pressure constant
Answers
Answer:
–156 °C
Explanation:
The following data were obtained from the question:
Initial temperature (T1) = –20 °C
Initial volume (V1) = 140 mL
Final volume (V2) = 65 mL
Final temperature (T2) =?
Pressure = constant.
Next, we shall convert –20 °C to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T1) = –20 °C
Initial temperature (T1) = –20 °C + 273 = 253 K.
Next, we shall determine the new temperature of the gas as follow:
Initial temperature (T1) = 253 K
Initial volume (V1) = 140 mL
Final volume (V2) = 65 mL
Final temperature (T2) =?
V1/T1 = V2/T2
140/253 = 65/T2
Cross multiply
140 × T2 = 253 × 65
140 × T2 = 16445
Divide both side by 140
T2 = 16445 /140
T2 = 117 K
Finally, we shall convert 117 K to celcius temperature. This can be obtained as follow:
T(°C) = T(K) – 273
T2 = 117 K
T2 = 117 K – 273
T2 = –156 °C
Thus, the new temperature of the gas is –156 °C
what reacts at room temperature with ethanol and also with ethanoic acid
Answers
Answer: Its esterification reaction.
when organic acid react with alcohol it forms ester and water. reaction is known as esterification reaction.
CH3COOH + C2H5OH → CH3COOC2H5 + H2O
ethanoic acid + ethanol → ethyl acetate + water
this reaction takes place in the presence of acid catalyst ( dil H2SO4).
in this reaction oxygen of ethanol with lone pair act as nucleophile and carbonyl carbon of acetic acid act as electrophile.. so its nucleophilic substitution reaction of -COOH group.
Explanation:
How many moles of KCI would be dissolved in 4 L of water to make a 2 M
solution?
1
A.
mole
B. 2 moles
C. 8 moles
D. 4 moles
Answers
Answer:
C. 8 Moles
Explanation:
Toluene is subjected to the action of the following reagents in the order given: (1) KMnO4,OH-, heat; then H3O (2) HNO3, H2SO4 (3) Br2, FeBr3 What is the final product of this sequence?
Answers
Answer:
See image attached
Explanation:
The reaction of toluene with alkaline potassium permanganate in the presence of heat leads to the oxidation of the -CH3 to give benzoic acid.
Reaction benzoic acid with HNO3/H2SO4 yields the nitronium ion (NO2+).
Recall that -COOH is a metal director and deactivated the ring towards electrophilic substitution hence the m-nitrobenzoic acid is formed.
Reaction with FeBr3/Br2 yields the product shown in the image attached.
Sugar and Salt in water magnetism, state of matter, or solubility?
please help!!!!
Answers
Answer:
solubility
Explanation:
A scientist performs an experiment involving the collision of two masses on a flat surface. She believes she has made a startling discovery: the total kinetic energy is not conserved. What might she have overlooked?
A.
Some gravitational potential energy may have been gained.
B.
Some gravitational potential energy may have been lost.
C.
Some energy may have been gained due to friction and/or sound.
D.
Some energy may have been lost due to friction and/or sound.
Answers
Answer:
c
Explanation:
Titration of a strong acid with a strong base. The pH curve for titration of 50.0 mL of a 0.100 M solution of hydrochloric acid with a 0.100 M solution of NaOH(aq). What volume of NaOH(aq) would be needed to reach the equivalence point if the concentration of the added base were 0.240 M?
Answers
Answer:
Explanation:
we know that M1V1=M2V2
M1=0.100 M
V1=50.0*10^-3 L
M2=0.100 M
V2=M1V1/M2
V2=0.100*50.0*10^-3/0.100
V2=0.05
To know the end point we use phenolphthalein as indicator. End point is a point where completion of reaction happen. The volume of NaOH needed to reach the equivalence point if the concentration of the added base were 0.240 M is 20.8ml.
What is titration?Titration is a technique by which we know the concentration of unknown solution using titration of this solution with solution whose concentration is known.
The balanced equation is
HCl+NaOH[tex]\rightarrow[/tex]NaCl+H₂O
Using following equation
M₁×V₁=M₂×V₂
Where,
M₁=molarity of HCl= 0.100 M
V₁=volume of HCl=50.0 mL
M₂=molarity of NaOH=0.240 M
V₂=volume of NaOH=?
Substituting the given values
0.100 M ×50.0 mL=0.240 M×V₂
V₂=20.8ml
Therefore, the volume of NaOH needed to reach the equivalence point if the concentration of the added base were 0.240 M is 20.8ml.
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You have two pure substance that you cannot identify. Each sample is solid at room temperature. Describe at least five steps in the appropriate sequence that you would take to be able to identify the substance.
Answers
Answer:
pue like ad
Explanation:
For the two pure substance that you cannot identified , The steps taken in the right sequence are:
When two pure substance are places before you. you have to visually anaylse the sample, note the various colors that they have. It can tell you if it's an anions or cations.You can use reactants to precipitate the cations of the sample you have We then add a reactant to the sample and you did not see any precipitate, it corresponds to any of the elements or compound. If you do not see a precipitate, you can add other reactant.You then observe the color of this precipitate. example if the color changes to green, it will tell you that the substance is Ni(OH)₂ etc. One can also find out through the melting and boiling point of the two substances.Pure substance are regarded as substance that does not have impurities. one common way of finding out the purity of a substance is by its melting and boiling point determination.
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What is the mass number of an atom that has 19 protons, 19 electrons, and 20 neutrons?
Answers
Answer:
[tex]\boxed {\boxed {\sf 39}}[/tex]
Explanation:
The mass number of an atom can be found by adding the number of protons and neutrons.
[tex]mass \ number =protons + neutrons[/tex]
There are 19 protons and 20 neutrons.
[tex]protons=19 \\neutrons=20[/tex]
[tex]mass \ number= 19+20[/tex]
[tex]mass \ number =39[/tex]
The mass number of this atom is 39
What is the answer? Please
Answers
A rigid container filled with a gas is placed in ice (ex. nalgene bottle). What will happen to the pressure of the gas? What do you think will happen to the volume?(Graph)
Answers
Explanation:
The pressure will decrease but the volume remains constant
Complete the balanced molecular chemical equation for the reaction below.
If no reaction occurs, write NR after the reaction arrow.
Cu2SO4(aq) + Li3PO4(aq)
Answers
Answer:
Following are the complete balance of the given equation:
Explanation:
Given equation:
[tex]Cu_2SO_4(aq) + Li_3PO_4(aq)[/tex]
[tex]Cu_2So4\ (aq)+Li_3Po_4 \(aq) \longrightarrow Cu_3(Po_4)\ (aq)+Li_2So_4 \ (aq)[/tex]
After Balancing the equation:
[tex]3 Cu_2So4\ (aq)+ 2 Li_3Po_4\ (aq) \longrightarrow 2 Cu_3(Po_4)\ (aq)+ 3Li_2So_4 \ (aq)[/tex]
In the above equation, when the 3 mol Copper sulfate reacts with 2 mol lithium phosphate , it will produce 2 mol Copper phosphate and 3 mol Lithium sulfate .
Balance the following equations ___Fe + __O2= ___Fe3O4
Answers
There needs to be the same amount of each element on each side of the equation !
When you apply heat energy to a substance, where does the energy go? Think about the law of conservation of energy.
Answers
Answer:
the heat energy is transformed to any kind of energy depending on what it's meant to be transformed to.
remember it cannot be destroyed so it's definitely transformed to some kinda energy
how many sodium ions are in 1.4 kg of sodium chloride, NaCl?
Answers
Answer:
1.44 x 10²⁵ ions of Na⁺
Explanation:
Given parameters:
Mass of NaCl = 1.4kg = 1400g
Unknown:
Number of ions of sodium = ?
Solution:
The compound NaCl in ionic form can be written as;
NaCl → Na⁺ + Cl⁻
In 1 mole of NaCl we have 1 mole of sodium ions
Now, let us find the number of moles in NaCl;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Number of moles = [tex]\frac{1400}{58.5}[/tex] = 23.93mol
So;
Since 1 mole of NaCl gives 1 mole of Na⁺
In 23.93 mole of NaCl will give 23.93 mole of Na⁺
1 mole of a substance = 6.02 x 10²³ ions of a substance
23.93 mole of a substance = 6.02 x 10²³ x 23.93
= 1.44 x 10²⁵ ions of Na⁺
A collection of the same kind of cells working together to do the same job
Answers
Answer:
A group of cells doing the same job forms a tissue. A group of tissues working together forms an organ. Organs work in groups, too. A group of organs doing the same job is called a system.
Explanation:
A child is prescribed morphine sulfate at 35.0 mcg/kg/dose. The child weighs 85 lb and the solution is available as a 5.0-mg/mL vial. How many milliliters should be injected?
Answers
Answer:
270 mL
Explanation:
First we convert the child's weight to kg:
85 lb * [tex]\frac{453.592g}{1 lb} *\frac{1kg}{1000g}[/tex] = 38.56 kgSo the total mass of morphine sulfate that should be injected is:
38.56 kg * 35.0 mg/kg/dose = 1349.6 mg/doseFinally we calculate the volume that should be injected, using the concentration of the available solution:
1349.6 mg ÷ 5.0 mg/mL = 269.9 ≅ 270 mLThe accurate millilitre is 268 mL.
First of all, we must obtain the mass of the child in kilograms;
1 Ib = 0.45 Kg
85 lb = 85 lb × 0.45 Kg/1 Ib
= 38.25 Kg
If 1 Kg takes 35.0 mcg/kg/dose
38.25 Kg takes 38.25 Kg × 35.0 mcg/kg/dose/1 Kg
= 1338.75 mg/dose
Hence;
1338.75 mg/dose/5.0-mg/mL = 268 mL
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If element X has 6 valence electrons, what is the formula between element X and
magnesium.
a. X6Mg2
b. MgX3
c. MgX
d. XMg
Answers
What do chemical compounds want to obey?
Answers
Answer:
Their atoms obey the octet rule
Explanation:
Chemical compounds are formed when atoms combine with one another in order to comply with the octet rule. The octet configuration gives an atom stability in electronic structure.
When atoms become isoelectronic with noble gases, it confers a special stability on them. Therefore, to attain this state, they gain or lose electron or share their electrons with other species.Copper coins turn green when exposed to water. What happens to this chemical reaction if the coins are heated?
1.The coins will turn green slower because chemical reactions slow down with higher temperatures
2.The coins will turn green faster because chemical reactions speed up with higher temperatures
3.The coins will turn green at the same rate as before because temperature has no affect on the speed of chemical reactions
4.The coins will not turn green, algae cannot survive in hot temperatures
Answers
Answer:
The coins will turn green faster because chemical reaction speed up with higher temperatures
Copper coins turn green when exposed to water because the coins will turn green faster because reaction speeds up with higher temperatures.
What is the rate of the chemical reaction?The rate of a chemical reaction can be defined as the speed at which the products are formed from the reactants. The rate of a reaction gives information about the time frame under which a reaction can be finished.
The rate of reaction can be described as the speed of a chemical reaction at which reactants are transformed into products. Some chemical reactions are generally instantaneous, while some reactions take time to reach the final equilibrium. Pressure increases the concentration of gaseous reactants resulting in an increase in the rate of reaction.
The rate of reaction will increase with an increase in the temperature of the reaction as the reactant molecules get more kinetic energy and increase the number of collisions.
Therefore, copper coins will turn green faster because reactions speed up with higher temperatures.
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What does this passage explain about people?
why mothers favor some children over others
the contrasting sides of human nature
why there is harmony in all things
left- and right-handedness
Answers
Answer:
the contrasting sides of human nature
Explanation:
I took the test
Which of the following examples of erosion would occur most quickly?
OA. A river erodes sediment to form a canyon.
ОВ.
A glacier carves out a path as it moves.
OC. A wind storm moves sand from one area to another
OD
Ocean waves erode a large rocky cliff.
Answers
Answer: OC
Explanation:
The Others Could Take Many Millions Of Years
A student has a balloon with a volume of 2.5 liters that contains 4.0 moles of air. The ballon has a small leak, allowing one mole to escape, leaving just 3.0 moles of air inside the balloon. What is the balloon's new volume after the air has escaped?
Answers
Answer:
1.9 L
Explanation:
Step 1: Given data
Initial number of moles of air (n₁): 4.0 molInitial volume of the balloon (V₁): 2.5 LFinal number of moles of air (n₂): 3.0 molFinal volume of the balloon (V₂): ?Step 2: Calculate the final volume of the balloon
According to Avogadro's law, the volume of an ideal gas is directly proportional to the number of moles. We can calculate the final volume of the balloon using the following expression.
V₁ / n₁ = V₂ / n₂
V₂ = V₁ × n₂ / n₁
V₂ = 2.5 L × 3.0 mol / 4.0 mol
V₂ = 1.9 L
2. A person with a body temperature of 37°C holds an ice cube with a temperature of 0°C
in a room where the air temperature is 20°C. The direction of heat flow is
a) From the person to the ice, only
b) From the person to the ice and air, and from the air to the ice
c) From the ice to the person, only
d) From the ice to the person and air, and from the air to the person
Answers
Answer:
b) From the person to the ice, and from the air to the ice
Explanation:
The direction of heat flow in the room is from the person to the ice and from the air to the ice.
The ice is at the lowest temperature.
Heat flows from a place with a higher measure of heat to a place with a lower amount of heat. Since the ice has the lowest heat, there is a thermal gradient set up. Heat will flow from the body and air towards to the ice.In a titration, you start with 0.05 M sodium hydroxide (NaOH) and slowly add it to 40 mL of HC1 with an unknown concentration. What is the original concentration of the HC1 if you add a total of 15.4 mL of sodium hydroxide to the HC1 to achieve pH =7?
Answers
Answer:
The original concentration of the HCl is: 0.01925 M
Explanation:
Equation:
HCl+NaOH-------> NaCl+H₂O
Volume of NaOH added = 0.05 M
No of moles of NaOH = 15.4 mL [tex]x\frac{1 L}{1000 mL} x\frac{0.05 mol NaOH}{L}[/tex]
= 0.00077 mol NaOH
Then,
Volume of HCl solution = 40 mL x 1/1000 mL
= 0.0400 L
Therefore,
Concentration of HCl = 0.00077 mol/0.0400 L
= 0.01925 M
Now, to find the pH:
pH = -log₁₀[H⁺]
= -log₁₀(2x10⁻⁶)
= 5.7
H20+ SO3 ? Which compound is likely produced by the chemical reaction?
Answers
Answer:
h2so4
Explanation:
im big brain.
Is there anyone studying a doctor in pharmacy?
Answers
Answer:
no I am in 8 standard
I am already preparing for a doctor for my future
According to VSEPR theory, a molecule with the general formula AX4 E1 will have a __________ molecular shape.a. T-shaped square planar b. seesaw c. trigonal planar d. trigonal bipyramidal e. tetrahedral
Answers
Answer:
The answer is "Option e"
Explanation:
The ionic bond arousal system of the outer shells (VSEPR) allows us to determine which one of the feasible solutions are found in the majority of instances. It's also supposed to occupy the space with electrical pairs and also to reduce electrical couple repulsive forces to a minimum, its cheapest electricity framework. This theory can be used for predicting a form of electron pairs with a different mass of a particle's core electrons.