How many molecules of hydrogen are produced if 13.05 g of Zn reacts with excess hydrochloric acid equation Zn plus HCL equals ZnCl2 plus H2?
1. Write and balance the equation.
2. Convert grams Zn to moles. moles = grams/molar mass.
3. Using the coefficients in the balanced equation, convert moles Zn to moles hydrogen.
4. Convert moles hydrogen to molecules remembering that 1 mole will contain 6.022 x 10^23 molecules.
Post your work if you get stuck.