posted by yellowone on .
how many grams of zinc are required to react with excess acid to make one liter of hydrogen at STP?
i have no clue how to go about this i need help
Write the balanced equation.
Zn + 2HCl ==> ZnCl2 + H2
2. Use PV = nRT to convert 1 L H2 gas to mols OR take the shortcut knowing that 1 mol of a gas occupies 22.4 L at STP.
3. Use the equation to convert mols H2 to mols Zn.
4. Then convert mols Zn to grams Zn.
g Zn = mols Zn x atomic mass Zn.