Question

A sample of carbon dioxide gas that has a volume of 14.6 L at STP contains how many

mol(s) of gas (to three significant figures).

Answer 1

n = 0.651 mol

Step-by-step explanation:

Given data:

Volume of CO₂ = 14.6 L

Temperature = standard = 273.15 K

Pressure = standard = 1 atm

Number of moles of CO₂ = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K

T = temperature in kelvin

by putting values,

1 atm × 14.6 L = n × 0.0821 atm.L/ mol.K × 273.15 K

14.6 L. atm = n × 22.43atm.L/ mol

n = 0.651 mol