Question

Calculate the mass of chromium produced from 5 kg of Cr2O3.

Answer 1

3421.34 g

Step-by-step explanation:

2Cr2O3 → 4Cr + 3O2

From the equation abve;

2 mol of Cr2O3 produces 4 mol of Cr

Converting 5 kg of Cr2O3 to mol;

Number of moles = Mass / Molar mass = 5000 / 151.99 g/mol = 32.9 mol

2 mol = 4 mol

32.9 mol = x

Solving for x;

x = 32.9 * 4 / 2

x = 65.8 mol

Mass = Number of moles * Molar mass

Mass = 65.8 * 51.9961

Mass = 3421.34 g