posted by Lindt .
In the reaction:
Zn + 2 HCl ZnCl2 + H2
An excess of Zn is reacted with 300.0 g of HCl. How many grams of H2 will be produced?
You need to learn where the arrow keys are (and use them).
mols HCl = grams/molar mass
Convert mols HCl to mols H2 using the coefficients in the balanced equation. .
Convert mols H2 to g. g = mols x molar mass.