1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
just olya [345]
3 years ago
8

A sample containing 1.20 moles of Ne gas has an initial volume of 7.50 L. What is the final volume of the gas, in liters, when e

ach of the following changes occur in the quantity of the gas at constant pressure and temperature?​
1) a leak allows one half of the Ne atoms to escape
2) a sample of 3.10 moles of Ne is added to the 1.20 moles of Ne gas in the container
3) a sample of 35.0 g of Ne is added to the 1.20 moles of Ne gas in the container.
Chemistry
1 answer:
Marat540 [252]3 years ago
6 0

Answer:

1 = 3.75L

2 = 26.91L

3 = 18.37L

Explanation:

Hello,

The question above can be solved when we know Avogadro's law which states that the volume of a fixed mass of gas is directly proportional the number of moles present provided temperature and pressure are kept constant.

Mathematically,

N = kV k = n/v

N1/V1 = N2/V2 = N3/V3 =......=Nn/Vn

N1 = 1.20 moles

V1 = 7.50L

1) if half of the Ne atoms escaped what would be the final volume.

1 mole of Ne = 6.022×10²³ atoms

½(1.20) moles of Ne = ?

0.6 moles of Ne = ?

1 mole = 6.022×10²³ atom

1.2 moles = ?

x = 1.2 × 6.022×10²³ atoms

x = 7.23×10²³atoms

If ½ of 7.23×10²³ atoms escaped, how many would be left

½ × 7.23×10²³ atoms = 3.61×10²³atoms

Now we have to find the number of moles and then use our equation.

1 mole = 6.022×10²³ atoms

y mole = 3.61×10²³ atom

y = 0.6 mole

N2 = 0.6 mole

N1 / V1 = N2 / V2

Make V2 the subject of formula,

V2 = (N2 × V1) / N1

V2 = (0.6 × 7.50) / 1.20

V2 = 3.75L

The volume after half of the Ne atoms escaped is 3.75L

2)

When a sample of 3.10 mole is added to 1.20 moles present

N1 = 1.20

V1 = 7.51

N2 = (1.20 + 3.10) = 4.30L

V2 = ?

N1 / V1 = N2 / V2

V2 = (N2 × V1) / N1

V2 = (4.30 × 7.51) / 1.20

V2 = 26.91L

The volume of Ne gas if 3.10 moles is added to it is 26.91L

3)

A sample of 35g is added to the 1.20 mole Ne in the container.

We need to convert the mass (35g) to moles. This can be done using mass-molarmass relationships

Number of moles = mass / molar mass

Molar mass of Ne = 20.17g/mol

Number of moles = 35 / 20.17

Number of moles = 1.735 moles

N2 = 1.20 moles + 1.735 moles

N2 = 2.935 moles

N1 / V1 = N2 / V2

V2 = (N2 × V1) / N1

V2 = (2.935 × 7.51) / 1.20

V2 = 18.37L

On addition of 35g of Ne gas to the container, the volume is increased to 18.37L

You might be interested in
Boyle's Law represents the relationship of volume as pressure changes. The constants of Boyle's Law are:
Aleksandr [31]

Answer:

d. Temperature and number of molecules of gas  

Step-by-step explanation:

Boyle's Law states, "The volume of a fixed mass of a gas is inversely proportional to the pressure if the temperature remains constant."

Let's examine the words.

"… volume…is inversely proportional to the pressure …" This means that volume and pressure are the <em>variables</em>.

"… fixed mass of a gas …" means that the number of molecules is constant.

"… temperature remains constant" speaks for itself.

a, c, and e are <em>wrong</em>, because pressure is a variable.

b is <em>wrong</em>, because volume is a variable.

5 0
3 years ago
Passive prostheses are:
Len [333]

Passive prostheses are self-regulating, as shown in the first answer option.

We can arrive at this answer because:

  • Passive prostheses are devices used to replace parts of the body that were lost by an incident.
  • These prostheses are very useful to establish balance or the aesthetics of the body, but they have no articulations and no movement mechanism, being static.

This limitation allows passive prostheses not to need external regulation and to be self-regulated by fitting the body parts.

You can find more information about articulations and their effects on the link:

brainly.com/question/5847359?referrer=searchResults

5 0
2 years ago
Read 2 more answers
385 J of heat are needed to heat a piece of aluminum from 22°C to 45°C. If the specific heat of Al is 0.90 J/g°C, what is the ma
VikaD [51]

Answer:

M of Al=33.09g or 0.0331kg

Explanation:

Heat Energy= specific heat*mass*change in temperature

H=M*C*T

make M subject of the formula

M=H/CT

M=685J/0.90J/g°C*(45°C-22°C)

M=685J/0.90J/g°C*23°C

M=685J/20.7J/g

M=33.09g or 0.0331kg

4 0
3 years ago
Which of the following characteristics describe a paramecium
marishachu [46]

Answer:

i think it's a (not sure)

7 0
3 years ago
How many moles in .5g of sodium bromide?
Genrish500 [490]
I'm not sure how many sign fig's you are required to have.
However I think the final answer would be 0.05 Moles, because of the .5g, that is considered 1 sign fig.

6 0
3 years ago
Other questions:
  • Which of the following types of fingerprints is collected with gray or black powder and fingerprint tape?
    5·1 answer
  • Neutrons are found in the nucleus and separate the other particles so that the strong force can hold the nucleus together. Which
    5·2 answers
  • This reaction is an explosive reaction of a strong acid combining with a strong base.
    7·2 answers
  • Is there a clear difference between a very polar covalent bond and an ionic bond explain?
    12·1 answer
  • the movement of heat through touching molecules is called: A. conduction B. convection C. radiation​
    7·1 answer
  • Media X contains 2mM glucose, 5% NaCl and 10mM beef extract. This is an example of a (COMPLEX/DEFINED) media.
    10·1 answer
  • (Physical or chemical)Properties describe matter
    11·1 answer
  • In the outline of the Periodic Table below, some elements are shown as numbers.
    7·2 answers
  • Li2SO4 _____ an electrolyte in solution.<br> A. Is <br> B. Is not
    13·2 answers
  • A transverse wave moves a medium at an abtuse angle to the wave , true or false ?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!