so clearly each mole of Zn produces 1 mole of H2
6.5g = 0.1 mole Zn
So, since 1 mole of H2 occupies 22.4L at STP, ...
6.5g of zinc was reacted with excess HCL.calculate the volume of dry hydrogen gas.
my work
zn+2HCL-zncl2 + H2
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