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Question
Concentrated nitric acid oxidizes phosphorus to phosphoric acid according to the following equation:
\[\ce{P + 5HNO3 -> H3PO4 + 5NO2 + H2O}\]
If 6.2 g of phosphorus was used in the reaction, calculate the mass of nitric acid consumed at the same time.
Solution
\[\ce{\underset{[Steam 1 mole]}{P + 5HNO3} -> H3PO4 + H2O + 5NO2}\]
Mass of nitric acid consumed = `(315 "g")/(31 "g") xx 6.2 "g"`
= 63 g
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