Question

15. NI3 decomposes into Nitrogen gas and Iodine. If you start with 0.02 grams of NI3,How many moles of Nitrogen are produced at STP?

Answer 1

0.0000253moles

Explanations:

The decomposition of NI3 is given as shown below;

`2NI_3(s)→N_2(g)+3I_2(g)`

Given the following parameters

Mass of NI3 = 0.02 grams

Determine the moles of NI3

`\begin{gathered} moles\text{ of NI}_3=\frac{mass}{molar\text{ mass}} \\ moles\text{ of NI}_3=(0.02)/(394.719) \\ moles\text{ of NI}_3=0.0000507moles \end{gathered}`

Acoording to stochiometry, 2 moles of NI3 preoduces 1 mole of nitrogen. The mole of nitrogen produced is;

`\begin{gathered} mole\text{ of nitrogen}=(1)/(2)*0.0000597 \\ mole\text{ of nitrogen}=\text{0.0000253moles} \end{gathered}`

Hence the moles of nitrogen produced is 0.0000253moles