A pair of students are assigned a project. They are to design a container to put an egg in that will keep the egg from

breaking when dropped from a height of 10 feet. Before they gather materials for their project, describe the steps in the scientific design process that they should perform

Answers

Answer 1

In the egg drop project, Students will apply the principles of momentum and impulse to build housing for an egg survive being dropped from the maximum height possible to solve for momentum and force.

In the egg drop project, there will be several drops from various heights.  The egg must survive lower heights to progress to the highest. Student will try a few smaller heights. Only those who survive that is not leaking the smaller drops may proceed to the higher levels. From this egg drop theory a cracked egg is defined as one that is visibly leaking its contents. After each drop, student must be able to quickly open the container to show the egg. Grade will drop if not able to open quickly and may occur error. The container must be constructed with a hatch or a door so that the egg can be inserted or withdrawn too quickly. From this the momentum and the impulse can be determined.

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Related Questions

How did you get the solution to change from blue to yellow?

Answers

Adding an acid will change the blue colour to yellow. On addition of an acid, hydrogen ion concentration increases, equilibrium shifts towards removal of excess hydrogen ions and the solution will turn yellow.

Can somebody help me please

Answers

TRNA binds to mRNA codon 5'-AUG-3' through complementary base pairing, carrying methionine.

What is tRNA and its function?

Transfer RNA, also known by the acronym tRNA and formerly known as soluble RNA (sRNA), is an adaptor molecule made of RNA that, in eukaryotes, usually has a length of 76 to 90 nucleotides[2]. It acts as the physical connection between the mRNA and the amino acid sequence of proteins. tRNAs from bacteria usually have shorter genomes (mean = 77.6 bp) than those from archaea and eukaryotes (mean = 83.1 bp and 84.7 bp, respectively).

The mature tRNA exhibits the reverse trend, with eukaryotes having the smallest mature tRNAs (median = 74.5 nt), while tRNAs from bacteria are typically longer (median = 77.6 nt) than tRNAs from archaea (median = 76.8 nt).

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briefly describe the relationship between temperature and density of a gas

Answers

Answer:

Inversely proportional.

Explanation:

The density and temperature relationship for ideal gases is mathematically written as- Density and Temperature Relationship The density and temperature relation are proportionate. That is, the density is inversely proportional to temperature.

Why do clouds form behind a cold front and ahead of a warm front?

Answers

Clouds form behind a cold front and ahead of a warm front because of the difference in temperature and moisture between the two air masses.


When a cold front, which is an area of colder air, meets a warm front, which is an area of warmer air, the colder air forces the warmer air to rise. As the warmer air rises, it cools and the moisture in the air condenses to form clouds. This process is called adiabatic cooling.

Similarly, when a warm front meets a cold front, the warmer air rises over the colder air and cools, forming clouds. However, because the warm air is less dense than the cold air, it rises more slowly and the clouds that form are typically less dense and less likely to produce precipitation.

In both cases, the difference in temperature and moisture between the two air masses leads to the formation of clouds. This is why we often see clouds forming behind a cold front and ahead of a warm front.


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If a balloon is taken outside on a very cold day, what will occur?
A. The volume of the balloon will decrease. B. Gas will flow into the balloon. C. The volume of the balloon will increase. D. The pressure inside the balloon will increase. **

Answers

Answer:

A the volume of the ballon will decrease

Explanation:

This is because the temperature decreased so the particles slowed down and need less room or volume to move around and collide in

1)To conduct electricity, a solution must contain.
*nonpolar molecules.
*polar molecules.
*ions
*free electrons

2)The particles in............ can be separated from heterogeneous mixtures by passing the mixture through a filter.
*suspension
*solution
*colloid
*pure substance

3)match
1.solutions
2.colloids
3.suspensions
-larger than 1000 nm
-1 nm to 1000 nm
-smaller than 1 nm

Answers

Explanation:

1 sodium must contain free eelctron cuz electricity is created due to flow of electron

2 suspension

1. To conduct electricity, a solution must contain ions and free electrons.

2. The particles in a suspension can be separated from heterogeneous mixtures by passing the mixture through a filter.

3. Solutions - Smaller than 1 nm

Colloids - 1 nm to 1000 nm

Suspensions - Larger than 1000 nm

In a solution, ions can be present when an ionic compound dissolves and dissociates into its constituent ions. These ions can move freely within the solution, allowing for the conduction of electricity.

Free electrons are not bound to any specific atom and are able to move through the material, facilitating the flow of electric current.

A suspension is a heterogeneous mixture in which solid particles are dispersed in a liquid or gas medium.

Solutions contain particles that are smaller than 1 nanometer (nm) in size. Colloids consist of particles that range in size from 1 nm to 1000 nm. Suspensions contain particles that are larger than 1000 nm in size.

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All the particles split up into smaller particles

Answers

Particle splitting can occur through various mechanisms, such as nuclear fission, radioactive decay, and particle collisions.

Nuclear fission involves the splitting of an atomic nucleus into two or more smaller nuclei, releasing a significant amount of energy in the process. Radioactive decay is the natural process by which unstable atomic nuclei emit particles or radiation to become more stable. Particle collisions can also lead to the splitting of particles, as high-energy particles can break apart atomic nuclei or other particles.

These smaller particles may be subatomic particles such as protons, neutrons, and electrons, or even smaller particles like quarks and leptons.

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1.30 grams of H₂ are reacted with an excess of N₂ to produce 4.21 grams of NH3-
3H₂ + N2 → 2NH3
What was the percent yield for ammonia in this reaction?

A-27.40%
B-28.80%
C-57.50%
D-62.60%

Answers

To find the percent yield, we first need to calculate the theoretical yield, which is the amount of NH3 that would be produced if the reaction went to completion. We can do this by calculating the amount of NH3 that would be produced from the amount of H2 used in the reaction:

From the balanced chemical equation, we see that 3 moles of H2 react with 1 mole of N2 to produce 2 moles of NH3. Therefore, the number of moles of NH3 produced is:

moles of NH3 = (1.30 g H2) / (2.016 g/mol H2) x (2 mol NH3 / 3 mol H2) = 0.427 mol NH3

The molar mass of NH3 is 17.031 g/mol, so the theoretical yield of NH3 is:

theoretical yield = (0.427 mol NH3) x (17.031 g/mol NH3) = 7.28 g NH3

Now we can calculate the percent yield:

percent yield = (actual yield / theoretical yield) x 100%

The actual yield is given as 4.21 g NH3, so:

percent yield = (4.21 g NH3 / 7.28 g NH3) x 100% ≈ 57.85%

Therefore, the percent yield for ammonia in this reaction is approximately 57.85%, which is closest to option C (57.50%).

In different types of solutions, solvents must be liquids.
-True.
-False

Answers

SOLUTIONS

[tex] \mathbb{ANSWER:}[/tex]

False

Solvents can also be solid and gas not only liquid.

Answer:

True.

Explanation:

In order for a substance to dissolve in a solvent, the solvent must be a liquid. In different types of solutions such as solid-liquid, liquid-liquid, or gas-liquid solutions, the solvent always exists in the liquid phase.

How many grams of AgNO3 are needed to prepare 237.3 mL of 0.0312 M AgNO3 solution? m(AgNO3) = ___g​

Answers

Answer:

we need 1.605 grams of AgNO3 to prepare 237.3 mL of 0.0312 M solution.

Explanation:

First, let's write down the formula for calculating the mass of a solute:

mass = molarity x volume x molar mass

We are given the volume and molarity of the solution, so we just need to find the molar mass of AgNO3.

AgNO3 has a molar mass of 169.87 g/mol.

Now we can substitute into the formula:

mass = 0.0312 mol/L x 0.2373 L x 169.87 g/mol

mass = 1.605 g

Therefore, we need 1.605 grams of AgNO3 to prepare 237.3 mL of 0.0312 M solution.

A sample of oxygen, O 2 , occupies 32. 2 mL at 30 °C and 452 torr. What volume will it occupy at –70 °C and the same pressure?

Answers

Answer:

21.58 mL

Explanation:

this is Charles' law

V1/T1 = V2/T2

Temperature must be in Kelvin

V2= V1 X T2 / T1

32.2  x203.15 / 303.15

dont need pressure since its the same.

How many Magnesium atoms in the formula 3Mg(O3H2)3

Answers

The formula 3Mg(O3H2)3 denotes a molecule made up of three magnesium atoms and nine groups of hydroxide ions (O3H2), each of which contains three oxygen atoms and six hydrogen atoms.

What exactly is a molecule?

A molecule is a collection of two or even more than two atoms that are held together by chemical-bonds. These atoms could be of the same element or of different elements. H2O (water), for example, is a molecule composed of two (2) hydrogen atoms and one oxygen atom.

CO2 (Carbon dioxide) is just another example of the molecule made up of 1-carbon atom and 2-oxygen atoms. Molecules are the basic building blocks of many substances, and their unique arrangement and properties play an important role in a wide range of chemical reactions and biological processes.

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which is the most common useful element in fertilizer?

Answers

Modern chemical fertilizers include one or more of the three elements that are most important in plant nutrition: nitrogen, phosphorus, and potassium. Of secondary importance are the elements sulfur, magnesium, and calcium.

Answer: The most common useful element in fertilizer is mostly nitrogen since it is also found in air

What does a horizontal line on a position-time graph indicate about the object?(1 point)

Answers

A horizontal line on a position-time graph indicates that the object is not moving; its position is not changing.

What is a position-time graph?

A position-time graph is a type of graph used to show the change in the position of an object over time. It is typically a line graph with the x-axis representing time and the y-axis representing position.

The slope of the line corresponds to the speed of the object, while the area under the line represents the total distance traveled by the object.

Furthermore, the velocity of an object is represented by the slope of a location graph. Hence, the slope's value at a given instant corresponds to the object's velocity at that precise moment.

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A chemist titrates 190 ml of. 2412 nitrous acid solution with. 377 M KOH solution. Calculate the ph at equivalence. The pKa of nitrous acid is 3. 35

Answers

The equivalency solution has a pH of 2.624.

What is the procedure for making nitrous acid?

Nitrous acid is frequently created by adding a mineral acid to aqueous sodium nitrite solutions. Typically, acidification is carried out at ice-cold temperatures, and HNO2 is consumed on-site. Nitrous acid in its free form is unstable and breaks down quickly.

In a neutralization process, weak nitrous acid (HNO2) reacts with strong basic KOH.

HNO2 + KOH → KNO2 + H2O

Then, we determine how many moles of KOH were used:

volume KOH x concentration equals moles KOH. KOH

moles KOH = 0.190 L x 0.377 mol/L

moles KOH = 0.07153 mol

Next, we calculate the initial concentration of HNO2:

concentration HNO2 = moles HNO2 / volume HNO2

concentration HNO2 = 0.07153 mol / 0.190 L

concentration HNO2 = 0.3765 M

[HNO2] = 0.5 x 0.3765 M

[HNO2] = 0.1883 M

The following equation can be used to model how nitrous acid dissociates in water:

HNO2 + H2O ⇌ H3O+ + NO2-

The following equation relates the pKa to the acid dissociation constant, Ka, for this reaction:

pKa = -log Ka

So we can find the Ka value from the given pKa:

pKa = -log Ka

3.35 = -log Ka

Ka = 10⁻³

Ka = 4.47 x 10⁻⁴

The relationship shown below is true for the concentrations of the species involved at equilibrium:

Ka = [H3O+][NO2-] / [HNO2]

Ka = [H3O+][NO2-] / [HNO2]

Ka = [H3O+] [HNO2]

Solving for [H3O+], we get:

[H3O+] = Ka / [HNO2]

[H3O+] = (4.47 x 10⁻⁴) / (0.1883 M)

[H3O+] = 0.002374 M

Finally, we can calculate the pH of the solution:

pH = -log[H3O+]

pH = -log(0.002374)

pH = 2.624

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A 0. 807 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 32. 8 mL of 0. 384 M AgNO3 to completely precipitate all of the chloride present. What is percent composition by mass of sodium chloride and potassium chloride in the mixture?

Answers

The percent composition by mass of sodium chloride and potassium chloride in the mixture is 90.4% sodium chloride and 9.6% potassium chloride.

The percent composition by mass of sodium chloride and potassium chloride in the mixture can be calculated using the following equation:

%Mass Sodium Chloride = (Mass of Sodium Chloride / (Mass of Sodium Chloride + Mass of Potassium Chloride)) x 100

%Mass Potassium Chloride = (Mass of Potassium Chloride / (Mass of Sodium Chloride + Mass of Potassium Chloride)) x 100

Mass of Sodium Chloride = (32.8mL)(0.384M)(58.44g/mol) / 1000mL = 0.73 g

Mass of Potassium Chloride = 0.807 g - 0.73 g = 0.077 g

%Mass Sodium Chloride = (0.73 g / (0.73 g + 0.077 g)) x 100 = 90.4%

%Mass Potassium Chloride = (0.077 g / (0.73 g + 0.077 g)) x 100 = 9.6%
Therefore, the percent composition by mass of sodium chloride and potassium chloride in the mixture is 90.4% sodium chloride and 9.6% potassium chloride.

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What type of Electromagnetic energy does a T.V use?

ex: Infrared or Radio

Also how is it used in television?

Answers

Answer:

It's the type of radiation that lower frequency waves (such as visible light, microwaves, or radio waves) emit. Non-ionizing radiation is the kind that humans are typically exposed to when using electromagnetic wave-emitting technology, such as mobile phones, TVs, computers, powerlines, or microwaves.

Explanation:

hope this helps

A TV uses radio waves to receive broadcast signals from TV stations that transmit audio and video content. These signals are converted into electrical signals, which produce the audio and video output that we see and hear on the screen. The TV may also use infrared waves to communicate with remote controls.

Need some answers to these ASAP PLEASE

Answers

Answer: working on it

Explanation:

Answer:

a. 4 moles aluminum chloride = 8 moles chlorine (since each mole of aluminum chloride contains 2 moles of chlorine)

b. 1 mole aluminum chloride = 1 mole aluminum (since each mole of aluminum chloride contains 1 mole of aluminum)

c. It is not possible to determine the number of moles of chlorine from the given information.

Write a dissociation equation for how calcium chloride dissociates in water

Answers

CaCl 2(aq)→Ca 2+(aq)+2Cl −(aq) is a dissοciatiοn equatiοn fοr hοw calcium chlοride dissοciates in water.

What is reactiοn?

A chemical reactiοn is the transfοrmatiοn οf οne οr mοre chemicals, knοwn as reactants, intο οne οr mοre new cοmpοunds, knοwn as prοducts. The change in cοncentratiοn οf any οf the reactants οr prοducts per unit οf time can be used tο determine the rate οr speed οf a reactiοn. It is determined by the equatiοn rate=time + cοncentratiοn.

What is dissοciate iοn?

When dissοlved in water, the lattice οf an iοnic crystal disintegrates. When an iοnic sοlid substance dissοlves, dissοciatiοn—the separatiοn οf iοns—οccurs. Iοnic substances that are placed in water will break apart intο a pοsitive iοn and a negative iοn, a prοcess knοwn as electrοlytic dissοciatiοn οr iοnic dissοciatiοn. Iοnizatiοn is a term used tο describe this kind οf dissοciatiοn respοnse. Iοnizatiοn is the name οf the reactiοn, while electrοlytic sοlutiοns are the results.

Therefοre,

CaCl 2(aq)→Ca 2+(aq)+2Cl −(aq) is a dissοciatiοn equatiοn fοr hοw calcium chlοride dissοciates in water.

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Select the coefficients necessary to balance each equation. Choose a coefficient for every compound.

1. __NH4NO3⟶ __N2O+ __H2O

2. __Fe + __HCl⟶ __FeCl3 + __H2

Answers

Answer:

Explanation:

1) 1; 1; 2

2) 2; 6; 2; 3

Answer: NH4NO3 ⟶ 2N2O + 4H2O (balanced equation)

Coefficients: 1, 2, 4

2Fe + 6HCl ⟶ 2FeCl3 + 3H2 (balanced equation)

Coefficients: 2, 6, 2, 3

Your welcome stranger. (:

What information is conveyed in 2H2SO4 ?

Answers

displacement reaction

please make me brainalist and keep smiling dude

Zinc metal reacts with copper(II) sulfate solution according to the following equation:


Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)


Determine the maximum mass of copper that can be deposited when 1.20 g of zinc is

added to 50.0 cm
3 of 2.00 x 10-1 mol dm-3

copper(II) sulfate solution. ​

Answers

The mass of copper produced is  0.635 g from the question that has been asked here.

What is the stoichiometry of a reaction?

Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction. It involves the use of balanced chemical equations to determine the ratios of reactants and products in a reaction.

We can see that the reaction equation is;

Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)

Number of moles of Zn = 1.2g/65 g/mol

= 0.018 moles

Number of moles CuSO4 = 50/1000 * 0.2

= 0.01 moles

Then;

Since the reaction is 1:1

0.01 moles of CuSO4 will produce

0.01 mol * 63.5 g.mol

= 0.635 g

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based on the six given solvents, which of the following answers lists all of the solvents that are not suitable for liquid-liquid extraction of an aqueous layer? 1. n-pentane 2. dimethyl sulfoxide 3. hexanes 4. dichloromethane 5. toluene 6. isopropanol

Answers

The solvents that are not suitable for liquid-liquid extraction of an aqueous layer are 1. n-pentane, 3. hexanes, and 6. isopropanol.

Liquid-liquid extraction (LLE) is a separation process that is commonly used in the laboratory to separate and purify a solvent-containing dissolved solute mixture. Liquid-liquid extraction may be utilized to segregate an aqueous solution containing one or more organic solutes from a complex mixture of organic solutes or to remove a neutral substance from an acidic or basic aqueous solution. The process entails dissolving a compound or compounds from one solvent into another and then separating the newly formed two-phase system.

The solvents that are not suitable for liquid-liquid extraction of an aqueous layer are as follows:

1. n-pentane 3. hexanes 6. isopropanol

The following solvents are suitable for liquid-liquid extraction of an aqueous layer:

2. dimethyl sulfoxide 4. dichloromethane 5. toluene

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Indicate how many unpaired electrons each atom has. Drag the appropriate items to their respective bins. ResetHelp Ca Selected 0 unpaired electrons 1 unpaired electron 2 unpaired electrons 3 unpaired electrons 4 unpaired electrons 5 unpaired electrons

Answers

Here are the number of unpaired electrons for each of the given atoms:

Y: 0, Br: 1 , Ca: 0, Sn: 2, Br: 1

In order to determine the number of unpaired electrons for each of the given atoms, we need to look at the electron configuration for each atom.

Y (yttrium): Y has an electron configuration of [Kr] 4d¹⁰ 5s². This means that Y has a completely filled 4d subshell and no unpaired electrons.

Br (bromine): Br has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁵. This means that Br has seven electrons in its outermost energy level (4p⁵), and one of these electrons is unpaired.

Ca (calcium): Ca has an electron configuration of [Ar] 4s². This means that Ca has two electrons in its outermost energy level (4s²), and both of these electrons are paired.

Sn (tin): Sn has an electron configuration of [Kr] 4d¹⁰ 5s² 5p². This means that Sn has two electrons in its outermost energy level (5p²), and one of these electrons is unpaired.

Br (bromine): As above, Br has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁵. This means that Br has seven electrons in its outermost energy level (4p⁵), and one of these electrons is unpaired.

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correct form of question should be:

Compare the ways in which igneous and metamorphic rocks form. Include examples in your answer. (6 marks QWC)

Answers

Answer:

Igneous and metamorphic rocks are two of the three major types of rocks found on Earth, with the third being sedimentary rocks. Igneous rocks are formed from the solidification of molten magma or lava, while metamorphic rocks are formed from the transformation of existing rocks due to high temperature and pressure.

The formation of igneous rocks begins when magma or lava cools and solidifies. Magma is molten rock that is located beneath the Earth's surface, while lava is magma that has erupted onto the surface. When magma or lava cools and solidifies, it forms igneous rocks. There are two types of igneous rocks: intrusive and extrusive. Intrusive igneous rocks form when magma cools and solidifies slowly beneath the Earth's surface, while extrusive igneous rocks form when lava cools and solidifies quickly on the Earth's surface. Examples of igneous rocks include granite, basalt, and pumice.

In contrast, the formation of metamorphic rocks occurs when existing rocks are transformed due to high temperature and pressure. Metamorphism can occur when rocks are buried deep within the Earth's crust, or when they are subjected to high pressure and temperature due to tectonic activity. The transformation of existing rocks can result in the formation of new minerals, textures, and structures within the rocks. Examples of metamorphic rocks include marble, slate, and gneiss.

In conclusion, the formation of igneous and metamorphic rocks differ in terms of their origin and formation process. Igneous rocks are formed from the solidification of molten magma or lava, while metamorphic rocks are formed from the transformation of existing rocks due to high temperature and pressure. While both types of rocks can be found in various locations around the world, they differ in their properties, appearance, and composition.

Explanation:

as dr. jillian swift's research has shown, chemical isotope analysis is particularly useful for considering ancient diets. why is this?

Answers

chemical isotope analysis is particularly useful for considering ancient diets because it provides information that cannot be obtained from other sources.

Chemical isotope analysis is particularly useful for considering ancient diets because it can reveal the types of foods that were consumed by ancient people. This type of analysis is based on the fact that different isotopes of elements such as carbon, nitrogen, and oxygen are found in different types of foods.

For example, the isotopes of carbon found in wheat and barley are different from those found in meat and dairy products. By analyzing the isotopes of carbon, nitrogen, and oxygen in the bones and teeth of ancient people, researchers can determine what types of foods were consumed by these people.

This information can help researchers to understand how ancient people lived, what types of foods they ate, and how their diets may have affected their health and well-being. It can also provide insight into how food production and consumption patterns have changed over time.

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How does blood flow through your body. What is the path that it takes

Answers

A closed network of blood vessels, comprising arteries, veins, and capillaries, transports blood throughout the body.

These are some examples of the route blood takes:

The largest artery in the body, the aorta, is used to push blood out of the heart.

The aorta divides into smaller arteries that supply blood to the body's many organs and tissues.

The arteries gradually shrink to the size of arterioles, which are tiny channels that can assist control blood pressure and flow.

The tiniest blood veins in the body, known as capillaries, are then reached via arterioles. The blood and cells of the organism exchange nutrients and gases through capillaries.

Then, blood exits the capillaries and enters the tiny veins called venules.

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Prussian Blue is a vibrant, blue pigment that has been used for centuries.
Prussian Blue has a molecular formula of Fe(CN)18. What is Prussian Blue's
molar mass? Show all work to receive full credit. (5 pts)

Answers

Answer:

524.21 g/mol

Explanation:

The molar mass of a compound is the sum of the atomic masses of all the atoms in its chemical formula. The molecular formula of Prussian Blue is Fe(CN)18.

The atomic mass of iron (Fe) is 55.85 g/mol. The atomic mass of carbon is 12.01 g/mol and the atomic mass of nitrogen (N) is 14.01 g/mol. So the molar mass of the CN group is 12.01 g/mol + 14.01 g/mol = 26.02 g/mol.

Since there are 18 CN groups in one molecule of Prussian Blue, the total contribution of the CN groups to the molar mass of Prussian Blue is 18 × 26.02 g/mol = 468.36 g/mol.

So the molar mass of Prussian Blue is 55.85 g/mol + 468.36 g/mol = 524.21 g/mol.

what percentage of a tritium sample will remain after 11 years? the half-life of tritium is 12.3 years. please answer in percent and round your answer to one place past the decimal.

Answers

After 11 years, a tritium sample will contain about 41.6% of the original amount.

How many years are there in a tritium half-life?

A hydrogen isotope with a half-life of 12.3 years, tritium (also known as T or 3H) decays to 3He through beta decay.

Applying the formula for the half-life:N(t) = N₀(1/2)^(t/T)

where N(t) is the quantity still present at time t, N0 is the starting quantity, t is the time since the beginning of time, and T is the half-life.

For tritium, we have T = 12.3 years, and t = 11 years.

Substituting these values, we get:

N(11) = N₀(1/2)^(11/12.3)

We can multiply by 100 and divide N(11) by N0 to determine how much is left:

% remaining = (N(11) / N₀) * 100

% remaining = (1/2)^(11/12.3) * 100

% remaining = 41.6%

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A solution of 0.15M NH3 is only 1.1% ionized in solution. Calculate the pKa of NH4+. The Kb for NH3 is 1.8 x 10-5.m

Answers

The pKa of [tex]NH^{4+[/tex] would be 9.51.

pKa calculation

To solve the problem, we can use the equation for the ionization constant of a weak base, Kb:

Kb = [NH4+][OH-] / [NH3]

Since NH3 is a weak base, we can assume that the concentration of OH- ions produced by water is negligible. Thus, we can simplify the equation to:

Kb = [NH4+] / [NH3]

The equilibrium expression for the ionization of NH3 can be written as:

NH3 + H2O ⇌ NH4+ + OH-

The equilibrium constant for this reaction is:

Kw = [NH4+][OH-] / [NH3] = 1.0 x 10^-14

Since the concentration of OH- is negligible, we can assume that:

Kw = [NH4+][OH-] / [NH3] ≈ [NH4+][OH-] / [NH4+] = [OH-]

Substituting Kb and Kw into the equation above, we get:

Kb x [OH-] = Kw[OH-] = Kw / Kb = 1.0 x 10^-14 / 1.8 x 10^-5 = 5.6 x 10^-10

Since NH3 is only 1.1% ionized, we can assume that [NH4+] ≈ [OH-] = 5.6 x 10^-10

Using the equation for the ionization constant of NH4+, we get:

Ka = [NH3][H3O+] / [NH4+]

Since NH3 is a weak base, we can assume that [H3O+] ≈ [OH-] = 5.6 x 10^-10

Substituting the values into the equation, we get:

Ka = (0.15 x 0.011)/(5.6 x 10^-10) = 3.1 x 10^-10

Finally, we can use the relationship between Ka and pKa:

pKa = -log(Ka) = -log(3.1 x 10^-10) = 9.51

Therefore, the pKa of NH4+ is 9.51.

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A filibuster allows as few as ___________ Senators to ______________.Question 24 options:a) 25; delay a bill for six monthsb) 34; delay a bill for six monthsc) 34; prevent a bill from coming to a voted) 41; prevent a bill from coming to a vote 3.4 You have one piece on the bar. Your opponent controls the inner 2, 4 , and 6 points and has a blot on the 5 point. It is your turn. What is the probability of being able to hit the blot on your next roll? What is the probability of your having to enter from the bar without hitting the blot? Use the central idea of the article life after people by dolores vasquez and its development over the course of the article to write an objective summary of the text cite text evidence in the response Somebody pls help I need to pass this The angle measurements in the diagram are represented by the following expressions.\qquad \blueD{\angle A=7x + 24^\circ}A=7x+24 start color #11accd, angle, A, equals, 7, x, plus, 24, degrees, end color #11accd \qquad \greenD{\angle B=3x + 92^\circ}B=3x+92 start color #1fab54, angle, B, equals, 3, x, plus, 92, degrees, end color #1fab54Solve for xxx and then find the measure of \blueD{\angle A}Astart color #11accd, angle, A, end color #11accd:\blueD{\angle A} = Use the passage to answer the question.6. What does this excerpt illustrate about the process of approving treaties? (1 point)The treaty-making process must be followed exactly as described in the Constitution.OA treaty is not the only tool a President can use to make agreements with other countries.OThe treaty-making process is usually controlled by a Senate minority.OA treaty can be approved by the House of Representatives instead of the Senate. (PLS HELP!!!) Meadow voles are small mouse-like animals that eat plants and insects. Their niche in an ecosystem is a A. omnivore. B. herbivore. C. producer. D. scavenger. the introductory passage describes work to develop increasingly synthetic cells. what are some reasons that researchers are so interested in developing synthetic life, as opposed to simply developing more approaches to work with existing species of organisms? you should speculate about realistic options, as these are not all listed in the chapter. There is no way to minimize the problem of the wolves attacking herds.TrueFalse How many H atoms are there in 0.510 moles of H BitBakers is a small start-up selling local bakery items in Kansas. It has its organizational back end running from a small LAN setup. Recently, it received funding for its products to be sold on a larger scale. As a result of this funding, the firm has contracted Kevin to boost up its network strength so that it can traverse to more than one LAN segment. Analyze which of the following protocols he should apply in this scenario. ICMP TCP UDP IP Ella's buys a computer for $785. Her local tax rate is 7%. How much does Ella pay for the computer, including tax? Person who keeps moving instead of settling in one place is called a what? 3.2 3.3 34 Determine the mean number (rounded to the nearest whole number) of water tanks that were supplied to the construction site in March 2022 during weekdays. What type of numerical data was recorded on the calender in ANNEXURE A by the contractor? Determine the modal number of water tankers that were supplied to the construction site in June 2022. Records of the number of water tankers that were supplied to the construction site appear in the calender on ANNEXURE A. The water tanker has a fuel capacity of 460 litres.. The rate of fuel consumption of the Mercedes water tanker averages 5 km/t. The prices of fuel per litre in March and June 2022 appear below. MARCH 2022 FUEL PRICES DIESEL 50 ppm COST R19,55 JUNE 2022 FUEL PRICES DIESEL 50 ppm Source: COST R24,14 (3) (2) (2) Advisement of grade 12 learmer on to find balance between the new freedom and responsible behaviour also indicate how it can help them to act responsibly QUESTION 4Neither Chicago nor Los Angeles (are, is) split into boroughs like New York. are isQUESTION 5One of the most popular activities on a Sunday morning (are, is) reading the paper. are is What is MOST likely the biggest environmental problem with burning an oil slick in the ocean to remove it? A. It creates air pollution. B. The process is too slow to help wildlife. C. It only removes the top layer of oil. D. The fire kills organisms living on the surface. A radio waves transmitted from a certain radio station is represented by the wave equation: y=0.75 sin(0.67x-210^8 t) Calculate the (i) wavelength of the wave (ii) frequency of the wave (ii) velocity of the wave. Where x, y are in meters while t is in seconds How many moles of HO can be formed from 1. 84 10 molecules of NH from the following equation?4 NH(g) + 5 O(g) 4 NO(g) + 6 HO(g) What was the issue that would ""plague Poe for the rest of his life""?