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N2H2 Express your answer using four significant figures.

N2H2 Express your answer using four significant figures.

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Answer #1

We need the mass percent of nitrogen in N2H2

The mass of nitrogen in N2H2= 2 X atomic weight of Nitrogen

atomic weight of nitrogen = 14.0067 g / mole

Mass of nitrogen = 2 X 14.0067 = 28.0134 grams

Mass of hydrogen in sample = 2 X atomic weight of hydrogen

Atomic weight of hydrogen = 1.0079 g / mole

Mass of hydrogen in sample = 2 X 1.0079 g = 2.0158 grams

total mass of nitrogen and hydrogen = 28.0134 grams + 2.0158 grams = 30.0292 grams

%nitrogen = Mass of nitrogen X 100 / total mass = 28.0134 X 100 / 30.0292 = 93.29 %

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