How do you get from mass to moles in this problem?

Answers

Answer 1

Answer:

Answer:

what problem?

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Which is the smallest unit of ionic compound.a) Atom
b) ion
c) Free radical
d) None

Answers

Answer:

Explanation:

None of the following options are ionic compounds

a mixture of oxygen, hydrogen, and nitrogen gases exerts a total pressure of 282 kpa. if the partial pressures of oxygen and hydrogen are 110 kpa and 106 kpa respectively, what is the partial pressure exerted by nitrogen?

Answers

Answer : The partial pressure of $N_2$ is, 66 Kpa

Solution :

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

$P_T=p_(N_2)+p_(O_2)+p_(H_2)$

where,

$P_T$ = total partial pressure = 282 Kpa

$P_(N_2)$ = partial pressure of nitrogen = ?

$P_(O_2)$ = partial pressure of oxygen = 110 Kpa

$P_(H_2)$ = partial pressure of hydrogen = 106 Kpa

Now put all the given values is expression, we get the partial pressure of the nitrogen gas.

$282Kpa=p_(N_2)+110Kpa+106Kpa$

$p_(N_2)=66Kpa$

Therefore, the partial pressure of $N_2$ is, 66 Kpa

pressures oxygen and hydrogen + pressure nitrogen

110 Kpa + 106 Kpa = 216 Kpa

Partial pressure:

total pressure - exerted by nitrogen:

282 Kpa - 216 Kpa

= 66 Kpa

hope this helps!

Which of the following is true of a heterogeneous mixture?a. Different samples may not be exactly alike.
b. The density is the same throughout the entire mixture.
c. It is not possible to separate the various parts of the mixture.
d. Taking one sample will enable you to determine what it is made of.

Answers

Answer: Option (a) is the correct answer.

Explanation:

A heterogeneous mixture is defined as the mixture in which distribution of solvent particles is uneven throughout the solution.

For example, a mixture of sand and water is a heterogeneous mixture.

So, when we take different samples for the same heterogeneous mixture then there will be different composition of solute particles in each of them.

On the other hand, in a homogeneous solution there will be even distribution of solute particles into the solvent. Each sample of a homogeneous mixture will contain same composition of solute particles.

Thus, we can conclude that the statement different samples may not be exactly alike, is true of a heterogeneous mixture.

A, a heterogeneous mixture is a mixture where all the particles are not made up of one uniform composition. you can distinguish the different particles

All of the following methods would increase the solubility of a solid solute, except for

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may i please have a(n) answer choices please because it would be a lot better if it was like that and then ill answer it

HELP ME PLEASE 40 POINTS You may select a topic from the list below, or choose your own.black hole
oort cloud
star types (supergiant, red dwarf, white dwarf)
supernovae
planetary nebulae
Andromeda galaxy
quasar
Use the library and other resource materials to research and understand your topic. Remember that nasa.gov is a web site that has reliable information as well that you may use for your research. Now write a 300-word report on what you have learned in the essay box below.

Answers

Answer:

Do black hole

Explanation:

• 1) The pressure of a sample of gas in a 2.00-L container is 876 mmHg.What will the pressure be if the sample is placed in a 400 mL
container? P1V1=P2V2

Answers

Answer:

4380 mmHg

Explanation:

Boyle's Law can be used to explain the relationship between pressure and volume of an ideal gas. The pressure is inversely related to volume, so if volume decrease the pressure will increase. It can be expressed in the equation as:

P1V1=P2V2

In this question, the first condition is 2L volume and 876 mmHg pressure. Then the system changed into the second condition where the volume is 400ml and the pressure is unknown. The pressure will be:

P1V1= P2V2

876 mmHg * 2L = P2 * 400ml /(1000ml/L)

P2= 876 mmHg * 2L / 0.4L

P2= 4380 mmHg

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Which of the following is true of solids?A. All solids have equal melting points.B. Ionic solids have higher melting points than molecular solids.C. Molecular solids have higher melting points than all other types of solids.D. It is impossible for solids to melt; therefore solids do not have melting points.

How are HNO3(aq) and CH3COOH(aq) similar?(1) They are Arrhenius acids and they turn blue litmus red.(2) They are Arrhenius acids and they turn red litmus blue.(3) They are Arrhenius bases and they turn blue litmus red.(4) They are Arrhenius bases and they turn red litmus blue.

Given the balanced equation representing a reaction:C3H8(g) + 5O2(g)==>3CO2(g) + 4H2O(g)What is the total number of moles of O2(g) required for the complete combustion of 1.5 moles of C3H8(g)?(1) 0.30 mol (3) 4.5 mol(2) 1.5 mol (4) 7.5 mol