What is the mass of 9 moles of carbon dioxide?

We write given: v (CO2) = 9 mol
Find: m (CO2) -?
Decision:
Let us write down the formula by which, knowing the amount of substance (v), we can find the mass.
v = m / M, where M is the molar mass of the substance.
Let’s calculate the molar mass of a substance of carbon dioxide.
M (CO2) = 12 + 16 * 2 = 44 g / mol
Let us derive the mass of a substance from the previous formula and it will be equal to:
m = v * M
Let’s substitute our data into the formula and get:
m = 9 mol * 44 g / mol = 396 g
When multiplying, units of measure (mol) are reduced and grams remain.
Answer: The mass of carbon dioxide (CO2) is 396 g