Convert 42.97 grams of carbon monoxide (CO) to liters at STP.

Answer 1

Hello, Ariel,

A surprising, but highly useful, relationship is that of an ideal gas at STP and the amount of volume it occupies. Any gas at STP occupies 22.4 liters. CO₂, Cl₂, CH₄, etc. all will fit one mole into 22.4 liters at STP. Think of it as a conversion factor:

At STP. a gas has (22.4 liters/mole).

We can convert the 42.97 grams of CO into moles of CO by dividing by it's molar mass: 28.01 grams/mole.

(42.97 grams)/(28.01 grams/mole) = 1.534 moles CO

Multiply this by the above conversion factor:

(1.534 moles CO)*(22.4 liters/mole) = 34.36 liters

Bob