Oxygen gas in air reacts with 0.115 g hydrogen gas to give 1.024 g of water. Use

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Oxygen gas in air reacts with 0.115 g hydrogen gas to give 1.024 g of water. Use the conservation of mass law to predict the mass of reacting oxygen. 

2 H2(g) + O2(g) → 2 H2O(l)

(a) 0.115 g

(b) 0.909 g

(c) 1.024 g

(d) 1.139 g

(e) None of the above.

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