posted by Natalie .
I need help Calculating the mass of HCL neede to react with 20.0 grams Zn.
Zn+HCL -> ZnCl2+H2
Balance the equation first.
then, look at the coefficents. How many moles of HCl will be needed for each mole of Zn?
How many moles of Zn is twenty grams?