Question

What is the mass of 9.45 mol of aluminum oxide (Al2O3)?

254 g

709 g

964 g

1120 g

Answer 1

Answer:

mass = 963.53 grams

Explanation:

mass = moles x molar mass

m = 9.45 x 101.96 (molar mass of Al2O3)

m = 963.53g

Answer 2

Answer:

964g Al2O3

Explanation:

given: 9.45 mol Al2O3
Find: mass in grams Al2O3

solve:

We know the molar mass of Al2O3 is 101.96 g/mol by looking at the periodic table and adding up the mass.

the set up:

9.45 mol Al2O3 x 101.96g Al2O3/mol Al2O3

the moles cross out and you're left with g as the unit.

so solving

9.45 x 101.96 = 963.52 g = 964 g Al2O3