1. Molar Mass of Carbon

* The molar mass of carbon is 12.01 grams per mole (g/mol). This means one mole of carbon atoms weighs 12.01 grams.

2. Calculation

* Mass = Moles x Molar Mass

* Mass = 2.0 moles * 12.01 g/mol

* Mass = 24.02 grams

Therefore, the mass of 2.0 moles of carbon is 24.02 grams.