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Bezzdna [24]
3 years ago
9

A 4.00g sample of helium has a volume of 24.4L at a temperature of 25.0 C and a pressure of 1.00 atm. The volume of the helium i

s reduced to 10.4L, but the temperature and pressure of the gas are kept constant. What is the new quantity of the gas in moles
Chemistry
1 answer:
Leona [35]3 years ago
3 0

Answer:

0.852 mol

Explanation:

First we <u>convert 4.00 g of helium (He) into moles</u>, using its <em>molar mass</em>:

4.00 g ÷ 2 g/mol = 2 mol He

To answer this problem we can use<em> Avogadro's law</em>, which states that at constant pressure and temperature:

V₁n₂=V₂n₁

Where:

  • V₁ = 24. 4 L
  • n₂ = ?
  • V₂ = 10.4 L
  • n₁ = 2 mol

We <u>input the data</u>:

  • 24.4 L * n₂ = 10.4 L * 2 mol

And <u>solve for n₂</u>:

  • n₂ = 0.852 mol
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