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Use the balanced equation, 2H2+O22H2O, to answer the following question. How many grams of H2 are needed to react completely with 19.6g of O2 ?

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Use the balanced equation, 2H2+O22H2O, to answer the following question. How many grams of H2 are needed to react completely with 19.6g of O2 ? Be sure your answer has the correct number of significant figures. gH2

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