Water can be separated into its elements according to the following equation by electrolysis. If 20.0 g of water is decomposed by this method, how much oxygen gas is produced?
2H₂O (l) $\rightarrow$ 2H₂(g) + O₂(g)

Question

Water can be separated into its elements according to the following equation by electrolysis. If 20.0 g of water is decomposed by this method, how much oxygen gas is produced?
2H₂O (l)

\rightarrow

2H₂(g) + O₂(g)

Quizplus · Accepted Answer

According to the equation, 2 moles of water (36.0 g) will produce 1 mole of oxygen gas (32.0 g). Therefore, 20.0 g of water will produce (32.0/36.0) x 20.0 = 17.8 g of oxygen gas.

Water Can Be Separated into Its Elements According to the Following