Balance the equation;

___Mg+__HCI->__MgCI2+__H2
How many moles of hydrogen gas are produced when 3.0 mof magnesium react?

1 answer

when you balance it...and it is very easy...
Mg+2HCl>>MgCl2 + H2

you see that for each mole of Mg, you get one mole of H2. So for three moles of Mg, you get....