# AP Chemistry

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How many milliliters of a 0.62 M HCl solution are needed to react completely with 4.7 g of zinc to form zinc(II) chloride?

• AP Chemistry -

Write and balance the equation.

Zn + 2HCl ==> ZnCl2 + H2

mols Zn = grams/molar mass
Use the coefficients in the balanced equation to convert mols Zn to mols HCl.
Now M HCl = mols HCl/L HCl. Youhave mols HCl and M HCl, solve for L HCl and convert to mL.

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