Final answer:
To calculate the mass percent composition of nitrogen in each of the given nitrogen compounds, divide the molar mass of nitrogen by the molar mass of the compound and multiply by 100. The mass percent composition of nitrogen in NH₄NO₃ is 17.5%, in HNO₃ is 22.2%, in NaNH₂ is 29.8%, and in N₂O₅ is 13.0%.
Step-by-step explanation:
To calculate the mass percent composition of nitrogen in each of the given nitrogen compounds, you need to divide the molar mass of nitrogen by the molar mass of the compound and multiply by 100. Here are the calculations for each compound:
a) NH₄NO₃:
Molar mass of NH₄NO₃ = 80.04 g/mol
Molar mass of nitrogen = 14.01 g/mol
Mass percent composition of nitrogen = (14.01 g/mol / 80.04 g/mol) x 100% = 17.5%
b) HNO₃:
Molar mass of HNO₃ = 63.01 g/mol
Molar mass of nitrogen = 14.01 g/mol
Mass percent composition of nitrogen = (14.01 g/mol / 63.01 g/mol) x 100% = 22.2%
c) NaNH₂:
Molar mass of NaNH₂ = 47.04 g/mol
Molar mass of nitrogen = 14.01 g/mol
Mass percent composition of nitrogen = (14.01 g/mol / 47.04 g/mol) x 100% = 29.8%
d) N₂O₅:
Molar mass of N₂O₅ = 108.01 g/mol
Molar mass of nitrogen = 14.01 g/mol
Mass percent composition of nitrogen = (14.01 g/mol / 108.01 g/mol) x 100% = 13.0%