A #55*mL# volume of hydrochloric acid was poured on to an excess of magnesium turnings. What volume of dihydrogen gas evolved?
Well, one mole of gas at
And thus we interrogate the redox reaction........
And thus the moles of magnesium is equivalent to the moles of dihydrogen gas if there is molar equivalence.
Now I happen to know that if
And so we have a molar quantity of
Magnesium metal is in excess, and we do not have a handle on the volume of dihydrogen evolved.