Question

How many total atoms are there in 19.3 g of hydrazine (N_{2}*H_{2})

Answer 1

`3.87*10^(23)atoms`

Explanations:

Given the following parameters

Mass of hydrazine = 19.3 grams

Determine the moles of hydrazine

`\begin{gathered} moles\text{ of N}_2H_2=\frac{mass}{molar\text{ mass}} \\ moles\text{ of N}_2H_2=(19.3)/(30.02928) \\ moles\text{ of N}_2H_2=0.6423moles \end{gathered}`

According to the Avogadro's constant

`1mole\text{ of a substance}=6.02*10^(23)atoms`
`\begin{gathered} atoms\text{ of N}_2H_2=0.643*6.02*10^(23) \\ atoms\text{ of N}_2H_2=3.87*10^(23)atoms \end{gathered}`

Therefore the total atoms that are there in 19.3 g of hydrazine is 3.87 * 10^23 atoms