How many gram of oxygen are formed when 5.00g of dinitrogen monoxide decomposes?

Question

Dinitrogen monoxide gas ecomposes to form nitrogen gas and oxygen gas. How many gram of oxygen are formed when 5.00g of dinitrogen monoxide decomposes?

Answer 1

2(N2O) --> 2N2 + O2
N2O = 44 grams per mole (14*2 + 16)
5.00 grams / 44 grams per mole = 0.1136 moles N2O
Since 2 moles of N2O make one mole of O2,
0.1136 moles of N2O will make 0.0568 moles O2
O2 = 32 grams per mole (16*2)
0.0568 moles O2 * (32 grams per mole) = 1.818 grams O2

Answer 2

1