Chemistry, 04.10.2021 14:00 GEEKLIFE6598

Phosphorus combines with hydrogen to form phosphine. In this reaction, 123.9 g of phosphorus combines with excess hydrogen to produce 129.9 g of phosphine. After the reaction, 310 g of hydrogen remains unreacted. What mass of hydrogen is used in the reaction? What was the initial mass of hydrogen before the reaction?

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Phosphorus combines with hydrogen to form phosphine. In this reaction, 123.9 g of phosphorus combine...