Answer to Question #75253 in General Chemistry for chemistry

Question

What is the % nitrogen, by weight, in 8.086
grams of ammonium carbonate?
Answer in units of %.

Answer 1

The content of nitrogen in any amount of ammonium carbonate is always the same according to the law of constant composition.
1 mole of (NH4)2CO3 contains 2 moles of nitrogen.
Then 96 g of (NH4)2CO3 contains 28 grams of nitrogen.
w = 28/96 × 100% = 29.2 %