Answer to Question #151893 in General Chemistry for Nicole Beus

Question

For the decomposition reaction represented by the equation 2 H2O → 2 H2 + 1 O2, what is the theoretical yield of oxygen gas (in grams) when 4.5 moles of water decomposes? (The molar mass of oxygen gas, O2, is 32.00 g/mol.)

Answer 1

According to the balanced reaction equation the quantity of oxygen:

4.5 mol / 2 = 2.25 mol

The mass of oxygen: 32 g/mol * 2.25 mol = 72 g

Answer: 72 g