In the reaction H_2(g) + F_2(g) ->2HF(g), how many grams of HF gas are produced as 5 mol of fluorine react with excess H_2?

Feb 16, 2016

100

Explanation:

Normally 1 mole of ${F}_{2}$ reacts with 1 mole of ${H}_{2}$ giving 2 moles of HF (which is 20g).

We can say that 1 mole of ${F}_{2}$ gives 20 g of $H F$.
The questions is: 5 moles of ${F}_{2}$ give x (how much $H F$?)

$1 - 20$
$5 - x$
$x = 100 g$