Question

Use the molar volume to calculate each of the following at STP:

Calculate the number of moles of CO2 in 3.60 L of CO2 gas.

Calculate the volume, in liters, occupied by 0.600 mol of He gas.

Calculate the volume, in liters, occupied by 8.60 g of O2 gas.

Calculate the number of grams of Ne contained in 13.2 L of Ne gas.

Answer 1

molar volume is 22.4 L/mol

A)

number of mol = volume / molar volume

= 3.60 L / 22.4 L/mol

= 0.161 mol

Answer: 0.161 mol

B)

Volume = number of mol * molar volume

= 0.600 mol * 22.4 L/mol

= 13.4 L

Answer: 13.4 L

C)

Molar mass of O2 = 32 g/mol

mass(O2)= 8.60 g

use:

number of mol of O2,

n = mass of O2/molar mass of O2

=(8.60 g)/(32 g/mol)

= 0.26875 mol

Use:

volume = number of mol * molar volume

= 0.26875 mol * 22.4 L/mol

= 6.02 L

Answer: 6.02 L

D)

number of mol = volume / molar volume

= 13.2 L / 22.4 L/mol

= 0.589 mol

Molar mass of Ne = 20.18 g/mol

use:

mass of Ne,

m = number of mol * molar mass

= 0.589 mol * 20.18 g/mol

= 11.9 g

Answer: 11.9 g