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Water decomposes to hydrogen and oxygen gas as shown in the following reaction:

2H2O (g) → 2H­2 (g) + O2 (g)

Given a 6.80 g sample of H2O (MM = 18.0 g/mol), how many grams of oxygen (MM = 32.0 g/mol) is produced, assuming the decomposition goes to completion?

Correct!