Question

a chemist measured the amount of hydrogen fluoride produced during an experiment she finds that 1.27g of hydrogen flurries is produced. calculate the number of moles of hydrogen Fluoride produced 

Answer 1

Ans:-

The chemical reaction performed is

$H_2+$ $F_2 \rightarrow 2HF$

So according to the stoichiometry $1$ mole of $H_2$ produces $2$ mole of hydrogen fluoride($H_2$ )

therefore firstly find the moles of hydrogen($H_2)$

moles of hydrogen$=\dfrac{given mass}{molecular mass}$

$\Rightarrow$ $\dfrac{1.27}{2}=0.635mol$

So moles of Hydrogen fluoride$(HF)$ produced is $2\times0.635=1.27mol$