Question

Calculate the number of nitrogen atoms in 240 g of ammonium nitrate?

Answer 1

3.125 i believe is the answer

Answer 2

Answer : The number of nitrogen atoms are,
`3.61* 10^(24)`

Explanation : Given,

Mass of
`NH_4NO_3` = 240 g

Molar mass of
`NH_4NO_3` = 80 g/mole

First we have to calculate the moles of
`NH_4NO_3`

`\text{Moles of }NH_4NO_3=\frac{\text{Mass of }NH_4NO_3}{\text{Molar mass of }NH_4NO_3}=(240g)/(80g/mole)=3mole`

As we know that
`NH_4NO_3` contains 2 number of nitrogen atoms, 4 number of hydrogen atoms and 3 number of oxygen atoms.

Now we have to calculate the number of atoms of nitrogen.

As, 1 mole of
`NH_4NO_3` contains
`2* 6.022* 10^(23)` number of nitrogen atoms

As, 3 mole of
`NH_4NO_3` contains
`3* 2* 6.022* 10^(23)=3.61* 10^(24)` number of nitrogen atoms

Therefore, the number of nitrogen atoms are,
`3.61* 10^(24)`