Asked by Anon

Calculate the mass of Mg needed to produce ~40 mL of H2. how do I do this?
Answered by bobpursley
write a balanced chemical equation.

Mg+2HCl>>MgCl2 + H2

so for each mole of H2, one mole of Mg is required.
Answered by Anon
how do i figure out the moles of H2? Do I convert the mL to L and then divide that by the mass of H2?
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