Question

A sample of carbon dioxide gas collected at a pressure of 0.611 atm and a temperature of 300. K is found to occupy a volume of 868 mL. How many Moles of CO2 gas are in the sample? ___ mol

Answer 1

Answer:

0.02mol

Explanation:

Given parameters:

Pressure  = 0.611atm

Temperature  = 300K

Volume  = 868mL  = 0.868L

Unknown:

Number of moles of CO₂   = ?

Solution:

To solve this problem, we use the ideal gas law:

  PV  = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmdm³mol⁻¹K⁻¹  

T is the temperature

     n  = $\frac{PV}{RT}$   = $\frac{0.611 x 0.868}{0.082 x 300}$    = 0.02mol