Question

What is the mass of 8.90 moles of magnesium chloride, MgCl2?

Express your answer numerically in grams.

Answer 1

First, find the molar mass of MgCl2 by adding the molar masses of its components:

(24.305) + 2(35.453) = 95.211 g/mole MgCl2

Next, use stoichiometry to determine the mass of 8.9 moles of MgCl2:

95.211 g MgCl2 8.90 moles MgCl2
-------------- x ----------------- = 847.3779 g MgCl2
1 mole MgCl2