How many Milliliters of 3.50 M HCl (aq)are required to react 5.75g of Zn(s)?

Answer 1

Zn + 2HCl ==> ZnCl2 + H2
mols Zn = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols Zn to mols HCl.
Then M HCl = mols HCl/L HCl. You know M and mols, solve for L HCl and convert to mL.