Question

What is the percent composition by mass of nitrogen in the compound N2H4 (gram-formula mass = 32 g/mol)?

Answer 1

Answer:88%

Explanation:

Answer 2

Answer:

$\large \boxed{93\, \% }$

Explanation:

1. Calculate the molar mass of N₂H₄

2N = 2 × 14 = 28

4H = 2 ×  1  =  4

           Tot. = 32

2. Calculate the mass percent of N

$\text{\% of element} = \dfrac{\text{mass of element}}{\text{mass of compound}} \times 100 \, \% = \dfrac{\text{28}}{\text{32}} \times 100 \, \% =\mathbf{88 \, \%}\\\\\text{The percentage of N in N _{2} H _{4} is \large \boxed{\mathbf{88\, \% }} }}$