How many molecules are there in 2.80 kg of hydrazine, N_2H_2?

Feb 4, 2017

$\text{Hydrazine is}$ ${N}_{2} {H}_{4}$

Explanation:

$\text{Moles of hydrazine}$ $=$ $\text{Mass of hydrazine"/"Molar mass of hydrazine}$

$= \frac{2.8 \times {10}^{3} \cdot g}{32.05 \cdot g \cdot m o {l}^{-} 1} \cong 87 \cdot m o l .$

And if there are $87 \cdot m o l$, there are $87 \cdot m o l \times {N}_{A}$, where ${N}_{A} = \text{the avocado number} = 6.022 \times {10}^{23} \cdot m o {l}^{-} 1$,

And $87 \cdot m o l \times {N}_{A} = 5.26 \times {10}^{25}$ individual hydrazine molecules.

${N}_{2} {H}_{2}$ is $\text{diazene}$, which can exist in two isomeric forms. Why?