Question

How do you solve this ?

Answer 1

Answer:

6. 66.674

Explanation:

You are given moles of H20 and the question is asking you to find the mass. You take the amount of moles given, 3.70 mol H2O and multiply it by the molar mass of water to go from moles to grams. The molar mass is the mass of 1 mole of that atom. So 1 mole of H2O is 18.02 g.

3.70 moles H2O x 18.02g = 66.674 g

Answer 2

66.674

—— —
Given: mol H2O = 3.70
Molar Mass H2O (from periodic table) = 18.02


mass (g) = Molar mass (g/mol) x mol

mass = 18.02 x 3.70 = 66.674