Question

How many moles of n are in 0.185 g of n2o?

Answer 1

Answer : The number of moles of nitrogen are 0.00840 moles.

Explanation : Given,

Mass of
`N_2O` = 0.185 g

Moles of
`N_2O` = 44 g/mole

First we have to calculate the moles of
`N_2O`.

`\text{ Moles of }N_2O=\frac{\text{ Mass of }N_2O}{\text{ Molar mass of }N_2O}=(0.185g)/(44g/mole)=0.00420moles`

Now we have to calculate the moles of nitrogen (N).

In
`N_2O`, there are 2 moles of nitrogen atom and 1 mole of oxygen atom.

As, 1 mole of
`N_2O` contains 2 moles of nitrogen

So, 0.00420 mole of
`N_2O` contains 2 × 0.00420 = 0.00840 moles of nitrogen

Therefore, the number of moles of nitrogen are 0.00840 moles.