Find the number of moles in 25.0 grams of C6H6 with the correct number of significant figures.

Question

Find the number of moles in 25.0 grams of C6H6 with the correct number of significant figures.

Answer 1

25.0 g has 3 significant figures. The answer should thus have 3 significant figures.

molar mass of C6H6 = 78.11 g/mole

25.0 g x 1 mole/78.11 g = 0.320 grams