Give 264.2g of (NH4)2SO4, calculate the
a) amount of (NH4)2SO4
b) number of ions
c) number of atoms
d) number of H atoms
e) number of N atoms
With workings please! Thanks so much!

Answers

Answer 1

Answer:

D.

Explanation:

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Related Questions

Is the number of electrons in different shells of an atom fixed or unlimited ? Explain by giving an example.​

Answers

Answer:

the number of electrons in a particular shell is given by the formula 2n^2 . However an electron when gets very exicited loose energy in the forms of radiation and comes in high energy level shell.

a sample of gas measures 5 liters at 1 atm. to change the volume to a 3.5 liters at constant temperature what pressure must be applied

Answers

Answer:

0.7atm

Explanation:

3.5/5 because constant temperature


Explain why, when a force is applied to a piece of steel, it does not break but just
changes its shape.

Answers

Steel is a metal. Metals atoms are able to roll over each other into new positions without breaking the metallic bond. So, steel doesn't break but changes its shape.

Which law states that the pressure and absolute temperature of a fixed quantity of gas are directly proportional under constant volume conditions?
Boyle’s law
Charles’s law
Dalton’s law
Gay-Lussac’s law

Answers

Answer:

Gay-Lussac’s law

Explanation:

Gay-Lussac’s law is one of the gas laws discovered and proposed by a French scientist called Joseph Gay Lussac (1778 - 1850). In this law, it is stated that the pressure (P) of a gas varies directly with the absolute temperature (T) at a constant volume.

That is;

: P ∝ T

: P/T = K

Where:

P = pressure exerted by the gas

T = absolute temperature of the gas

K = the constant.

Hence, according to this question, the law that states that "the pressure and absolute temperature of a fixed quantity of gas are directly proportional under constant volume conditions" is Gay-Lussac’s law.

Answer:

D. Gay-Lussac’s law

Explanation:

have a great day :)

State the optimum pH for sucrase activity and describe how sucrase activity changes at more acidic and more alkaline pH values.

Answers

Answer:

Explanation:

The rather high specific activity of intracellular sucrase towards sucrose is known to be optimal at pH 6.0 and at a temperature of about 30°C. And thus, we can say that the optimum pH for sucrase activity is exactly at 6. Also, it's behaviour is said to be decreasing with increasing acidic and increasing alkallinic values.

help please I would really appreciate ​

Answers

Answer:

option C

Positive terminal of the cell connected with red

Explanation:

hope it may help you

¿QUE DATO DE LA CONFIGURACIÓN ELECTRÓNICA TE PERMITE UBICAR LOS ELEMENTOS QUÍMICOS EN LA TABLA PERIÓDICA?

Answers

The question is: WHAT DATA OF THE ELECTRONIC CONFIGURATION ALLOWS YOU TO LOCATE THE CHEMICAL ELEMENTS IN THE PERIODIC TABLE?

Explanation:

Elements which have same number of valence electrons tend to show similar chemical properties due to which they are placed in the same group.

Hence, electronic configuration of an element tells us the number of valence electrons present in an element. As a result, it becomes easy to locate the element in its respective group.

Which statement best describes John Dalton’s use of creativity in his work?

Answers

Answer:

c

Explanation:

How does chemistry affect sports?

Answers

Many types of sports rely on chemistry to help athletes reach peak performance and provide critical safety and protective functions along the way. Whether is like a tennis ball or baseball bat , athletes from all around the world depend on products of chemistry. Chemistry basically gets athletes to hit the ground running in more ways and chemistry creates the equipment that people play sports with.

I hope that answered ur question :]

How many particles are in 54.5 g of aluminum? Show your work.
A. Convert the mass of aluminum to moles of aluminum. Molar mass of aluminum (Al) = 26.98 g/mol
B. Convert the moles of aluminum to particles of aluminum. There are 6.02 x 1023 particles/mol.

Answers

There are 1.216x10^24 particles in 54.5g of aluminum.

A. 54.5/26.98 = 2.02mols of aluminum

B. 2.02mols*6.02x10^23 particles/mol = 1.216x10^24

Why does platinum metal make a good catalytic surface for reactant molecules?
It causes reactant molecules to be less reactive.
It strengthens bonds between reactant molecules.
It prevents products from breaking away from the surface.
It holds reactant molecules in a good position for them to react.

Answers

Answer:

it holds reactant molecules in a good position for then to react

Answer:

D. It holds reactant molecules in a good position for them to react.

Explanation:

Got a 100 on e2020.

Subtract to find the temperature changes

for the water and the metal.

Answers

Answer:

???what metal????????????

There are on average 43 g of sugar and 355 mL can of soda please calculate the molarity of sugar in the can of soda the molar mass of sugar is 342.2 g/mol

Answers

Explanation:

Given :

Amount of solute - sucrose (C12H22O11) = 41 g

Amount of solvent -soda  = 355-mL

Molarity of the solution with respect to sucrose= ?

Molarity(M) is a unit of concentration measuring the number of moles of a solute per liter of solution. The SI unit of molarity is mol/L.

Formula to find the molarity of solution :

               Molarity =  

Amount of solvent is given in mL, let’s convert to L :

               1 L = 1000 mL

Therefore, 355 mL in L will be :

                   

               = 0.355 L

We have the amount of solute in g, let’s calculate the number of moles first :

       Number of moles (n) =  

Molar mass of C12H22O11 = 342.29 g/mol.

Therefore, n =  

               = 0.119 moles.

Jonathan conducts an experiment to determine what solutes readily dissolve in water. He places 3 tablespoons of potting soil into one cup of water. He records his observations in 15-minute increments. After a half hour, he notices that some of the soil particles have separated and sank to the bottom. O 15 minutes 30 minutes Which term best describes the combination of soil and water?

A.Mixture
B. A solution
C. an alloy
D. an emulsion ​

Answers

Answer:

A. Mixture

Explanation:

What is the frequency of an electromagnetic wave that has a wavelength of 8.5 x 10^2 m in a vacuum? (The speed of light in a vacuum is 3.00 x 10^8 m/s.)

A. 1.2 x 10^-3 Hz
B. 2.8 x 10^-6 Hz
C. 3.5 x 10^5 Hz
D. 2.6 x 10^11 Hz

Answers

Answer:

C=3.5 x 10^5 Hz

Difference between
Atom and molecule​

Answers

Answer:

Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together.

Explanation:

its on safari ??????????

Increasing the concentration increases the speed of reaction by... increasing the number of collisions between products increasing the amount of energy in the system increasing the number of collisions between reactants lowering the activation energy of the reaction

Answers

Answer: increasing the number of collisions between reactants

Explanation:

A reaction is possible due to collisions between the reactants to create products. If we increase the concentration of reactants then that means that we are increasing the molecules of the reactants which would give them more chances to collide and make products.

For instance, using a non-chemistry example, if there are few cars in a large city, the accidents there will be less because the cars will have such space that they wouldn't collide with each other. If the number of cars in the city is increased however, there is now less space and more chances for cars to collide.

when water is added pH of the acidic solution
1 remain same
2 increases
3 decrease s
4 become zero

Answers

Answer:

the solution becomes less concentrated... meaning there is a decrease in acidity ...hence the pH slightly increases as lesser ph

means more acidity

What causes hurricane on Saturn?

Answers

Hurricanes on Saturn are caused by when the water clouds heat up and rise, causing storms (not too sure if this is the right answer, hope it helped).

What volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution?​

Answers

So you add 1.4 L of 12M NaOH to 0.6 L of 2M NaOH to get 2 L of 9M NaOH.

The volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution is 1.4 L and 0.6 L

What is Concentration ?

In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture.

Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.

Amount of stuff = concentration x volume.

We can set up 2 equations:

V₁ = volume 12M NaOH.V₂ =  volume 2M NaOH.

(12×V₁) + (2×V₂) = 9×2 = 18

12V₁ + 2V₂ = 18 (1)

V₁ + V₂ = 2 (2)

From (2) we get:

V₁ = (2 − V₂)

Substituting  V₁ back into (1)  ⇒

12 (2−V₂) + 2V₂ = 18

24 − 12V₂ + 2V₂ = 18

10V₂ = 6

V₂ = 0.6L

From (2) we can say:

V₁ + 0.6 = 2

V₁ = 2 − 0.6 = 1.4L

Therefore, The volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution is 1.4 L and 0.6 L

Learn more about concentration here ;

https://brainly.com/question/19221273

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Which of the following increases the ratio?
Both β+ and β– decay
Only β– decay
Neither β+ nor β– decay
Only β+ decay

Answers

Answer:

Only β+ decay

Explanation:

In positron emission, a proton is converted into a neutron and a positron. An anti neutrino is a particle that serves the purpose of balancing the spins.

During positron emission, the mass number to the daughter nucleus is the same as that of the parent nucleus but the atomic number of the daughter nucleus is less than that of the parent nucleus by one unit.

Positron emission increases the neutron/proton ratio.

The body's reaction to a change in the environment is called a response.
Please select the best answer from the choices provided
OT
OF

Answers

the first answer or “t” :)

Which question would most likely be studied by a physicist?
A.
Were there ever any living organisms on Mars?
B.
Should the government spend taxpayers' money to send space probes to Mars?
C.
How can the forces on a space probe be controlled so it will land on Mars?
D.
What type of substances make up the soil on Mars?

Answers

Answer:

C.

Explanation:

Physicists main field of study is physics. This includes everything from force, matter, energy, and even time among other things. Therefore, from the questions provided the one that would most likely be studied by a physicist would be How can the forces on a space probe be controlled so it will land on Mars? This is because this question deals with forces acting on an object, regardless of what the object is Force is a huge part of physics and therefore studied by Physicists.

8. In a chemical reaction, if the reactants are heated, the reaction usually
happens a) Faster
b) Slower
c) At the same rate

Answers

the reaction usually happens faster

What happens when phenol is treated with bromine water?

Answers

Answer:

Polyhalogen derivatives are given when Phenol is treated with bromine water, in which all the H-atoms present at the o- and p- positions are substituted by Bromine with respect to the -OH group.

hope it helps

thanku

Explanation:

Calculate the heat energy, in kJ, needed to increase the temperature of 375g of water by 45.0°C.​

Answers

Explanation:

https://socratic.org/questions/how-much-heat-kj-is-needed-to-raise-the-temperature-of-100-0-grams-of-water-from#216827

I need help finding out what this is please help

Answers

Answer:

search the Lewis dot structure you will know the answer.

Explain and describe how the photoelectric effect occurs on an atomic level in terms of protons, neutrons, and electrons

Answers

ANSWER:

Explaining the experiments on the photoelectric effect. How these experiments led to the idea if light behaving as a particle of energy called a photon.

Rob measures the solubility of three different salts in water at 22°C.

Which type of graph should he use to display his data?

Answers

Answer:

He should use a bar graph

Explanation:

Since this is a distinction between three very distinct categories a bar graph should be perfect

The answer to this question is D as it says in the answer sheet of the question paper but how?

Answers

Answer:

D

Explanation:

Because of their complementary nature, the oxidation and reduction processes together are referred to as redox reactions. The reactant that brings about the oxidation is called the oxidizing agent, and that reagent is itself reduced by the reducing agent. Examples are, mercury(II) oxide, oxygen, and the copper(II) ion are oxidizing agents, and carbon, hydrazine, and zinc are the reducing agents.

Answer:D

Explanation:Because of their complementary nature, the oxidation and reduction processes together are referred to as redox reactions. The reactant that brings about the oxidation is called the oxidizing agent, and that reagent is itself reduced by the reducing agent. Examples are, mercury(II) oxide, oxygen, and the copper(II) ion are oxidizing agents, and carbon, hydrazine, and zinc are the reducing agents.

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