What’s the mass of 0.75 moles of CO2? (Show the equation and your working)

33 grams

Explanation:

CO2 is the chemical formula of carbon dioxide.

Given that:

Amount of moles of CO2 (n) = 0.75

Mass of CO2 in grams = ?

Obtain molar mass of CO2 using the atomic masses of the individual elements

Carbon = 12g; O = 16g

CO2 = [12g + (16g x 2)

= 12g + 32g

= 44 g/mol

Since, n = mass in grams / molar mass

0.75 moles = mass in grams / 44g/mol

mass in grams = 0.75 moles x 44g/mol

mass in grams = 33

Thus, the mass of 0.75 moles of CO2 is 33 grams