Calculate how many cm3 of 1M HCl is necessary to dissolve 1g of magnesium ribbon

Answer 1

Mg + 2HCl ==> H2 + MgCl2
mols Mg = grams/atomic mass = ?
Using the coefficients in the balanced equation, convert mols Mg to mols HCl.That's 1 mol Mg = 2 mol HCl
Now M HCl = mols HCl/L HCl. You know mols HCl and M HCl, solve for L HCl and convert to cc3 (mL).

Answer 2

500cm^3