Question

The molecular mass of octane is 114.22 g/mol. What is the mass of 22.05 mol of octane?

Answer 1

In order to compute the mass of a substance, we may simply mulitply the number of moles of the substance by the molar mass of the substance, since molar mass is mass per mole. Therefore, we get: 114.22 * 22.05 = 2,518.55 grams 2,518.55 grams of octane are present.

Answer 2

In this item, we are asked to calculate for the mass of 22.05 mole of octane given that its molecular mass is equal to 114.22 g/mol. To answer this item, we simply have to multiply the number of moles with the molecular mass. That is, (114.22 g/mol)(22.05 mol) which is equal to 2518.221 grams.