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Nady [450]
2 years ago
14

A flexible container holds 100.0 miles of a gas. And additional 100.0 moles of gas particles are pumped into the container. The

pressure and temperature remain constant. Which of the following stamens is true. A. Volume will double b. Volume will half c. Volume will remain constant d. The change of the volume depends on the identity of the gas
Chemistry
1 answer:
PSYCHO15rus [73]2 years ago
3 0

Answer:

A. The volume will double.

Explanation:

The pressure and temperature are constant.

The only variables are volume and number of moles, so we can use <em>Avogadro’s Law</em>: The volume of a gas is directly proportional to the number of moles.

<em>V = kn </em>

Direct proportionality means that if you do something to one variable, the same thing happens to the other variable.

For example, <em>if you double the number of moles, the volume double</em>s.

In this example, you added 100.0 mol to 100.0 mol.

That made a total of 200.0 mol.

You doubled the number of moles, so you doubled the volume.

The volume did not halve, it did not stay constant, and it did not depend on the identity of the gas.

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Answer:Hydrogen is placed such because it exhibits some similar characteristics of both group1 and group VII elements.

Explanation:

The reason why hydrogen is similar to group 1 metals:

#It has same valence electron and inorder achieve octet state it can lose that electron and forms H+ ion

#It acts as a good reducing agent similar to group1 metals

#It can also halides

Similarity to halogens:

#hydrogen can also gain one electron to gain noble gas configuration. It can combine with other non metals to form molecules with covalent bonding.

#It exists as diatomin molecule,H2

#Have the same electronegativity nature

#its reaction with other metal

8 0
2 years ago
What is a characteristic of all fuel cells?
CaHeK987 [17]
B. Electrical energy is produced from oxidation reactions. 
I don't have an explanation for this though. Do you need one? I can probably look it up.
8 0
2 years ago
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Olympic cyclist fill their tires with helium to make them lighter. Calculate the mass of air in an air filled tire and the mass
inn [45]

<u>Answer:</u> The mass difference between the two is 7.38 grams.

<u>Explanation:</u>

To calculate the number of moles, we use the equation given by ideal gas follows:

PV=nRT

where,

P = pressure = 125 psi = 8.50 atm    (Conversion factor:  1 atm = 14.7 psi)

V = Volume = 855 mL = 0.855 L    (Conversion factor:  1 L = 1000 mL)

T = Temperature = 25^oC=[25+273]K=298K

R = Gas constant = 0.0821\text{ L. atm }mol^{-1}K^{-1}

n = number of moles = ?

Putting values in above equation, we get:

8.50atm\times 0.855L=n\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 298K\\\\n=\frac{8.50\times 0.855}{0.0821\times 298}=0.297mol

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      .....(1)

  • <u>For air:</u>

Moles of air = 0.297 moles

Average molar mass of air = 28.8 g/mol

Putting values in equation 1, we get:

0.297mol=\frac{\text{Mass of air}}{28.8g/mol}\\\\\text{Mass of air}=(0.297mol\times 28.8g/mol)=8.56g

Mass of air, m_1 = 8.56 g

  • <u>For helium gas:</u>

Moles of helium = 0.297 moles

Molar mass of helium = 4 g/mol

Putting values in equation 1, we get:

0.297mol=\frac{\text{Mass of helium}}{4g/mol}\\\\\text{Mass of helium}=(0.297mol\times 4g/mol)=1.18g

Mass of helium, m_2 = 1.18 g

Calculating the mass difference between the two:

\Delta m=m_1-m_2

\Delta m=(8.56-1.18)g=7.38g

Hence, the mass difference between the two is 7.38 grams.

5 0
2 years ago
Berny has a 0.15-kilogram candle, a 1.00-kilogram jar, and a 0.25 kilogram candle holder. He places the candle and candle holder
Kobotan [32]
It's a because if you add them together you till get 1.40
5 0
2 years ago
Read 2 more answers
Please help!!
Phantasy [73]
1.
cost in cents

cost = 5m



2.
miles = c + 2
7 0
2 years ago
Read 2 more answers
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