1. The problem statement, all variables and given/known data I have to find the mass of HCl (in grams) that is produced given the below reaction yields 18.7g of H3PO4. 2. Relevant equations PCl5 + 4H20 -> H3PO4 + 5HCl 3. The attempt at a solution I calculated the # of mols for H3PO4. I want to confirm if this mol value (0.190815119mol) is also the # of mol of H and # of mol of Cl, with regrards to HCl.. or is the number of mols of each of H and Cl fives times that of 0.190815119mol because of the coefficient "5"HCl ? Thanks!