How many grams of nitrogen are there in 7.5 g of Ca(NO₃)₂

Name: How many grams of nitrogen are there in 7.5 g of Ca(NO 3 ) 2
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Question

Quizplus · Accepted Answer

The molar mass of Ca(NO3)2 is 164 g/mol. It contains 2 moles of nitrogen per mole of compound. The molar mass of nitrogen is 14 g/mol, so 2 moles of nitrogen weigh 28 g. The fraction of nitrogen in Ca(NO3)2 is 28/164. Therefore, in 7.5 g of Ca(NO3)2, the mass of nitrogen is (28/164) * 7.5 g = 1.3 g.

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