Potassium superoxide (KO 2 ) can convert water and carbon dioxide to oxygen gas

Question

Potassium superoxide (KO 2 ) can convert water and carbon dioxide to oxygen gas according to the following reaction. What mass (in gram) of water can react with 61.7g of KO 2 ? 4 KO2 (s)+2H 2 O(l)+4 CO 2 (g) 3O 2 (g)+4 KHCO3(s)

Answer 1

First, you must determine the number of mols of KO2 you have. To do this, you divide 61.7g by the molar mass of KO2 (71 g/mol).

Secondly, you convert the number of mols of KO2 to the mols of H2O by observing molar ratios. Since the molar ratio of KO2:H2O is 4:2 for this reaction, you must divide the number of mols of KO2 by 2.

Finally, convert the mols of H2O to grams of H2O by multiplying the number of mols of H2O by the molar mass of water (18 g/mol).