Question

a 1.000 g sample of the rocket fuel hydrazine, n₂h₄, is burned in a bomb calorimeter. calculate the number of moles of n₂h₄ burned.
? mol n₂h₄
do not round.

Explanation:

Step1: Calculate molar mass of \( N_2H_4 \)

Molar mass of \( N \) is \( 14.007 \, g/mol \), molar mass of \( H \) is \( 1.008 \, g/mol \). For \( N_2H_4 \), molar mass \( M = 2\times14.007 + 4\times1.008 \).
\( M = 28.014 + 4.032 = 32.046 \, g/mol \).

Step2: Use moles formula \( n=\frac{m}{M} \)

Given mass \( m = 1.000 \, g \), molar mass \( M = 32.046 \, g/mol \). So \( n=\frac{1.000}{32.046} \).

Answer:

\(\frac{1.000}{32.046}\) (or approximately 0.031205 if calculated, but as per instruction, do not round, so keep as \(\frac{1}{32.046}\) or 1/32.046)