Sadie M. answered 01/20/21
Chemistry Teaching Expert! 8+ Years Experience- General & Organic Chem
Use the coefficients of the balanced equation to convert from moles of C3H6O2S to moles of H2O
The units you want to cancel out should be opposite of one another (mol of C3H6O2S is what you want to cancel out)
0.3005 moles C3H6O2S x (3 mole H2O / 1 mole C3H6O2S) = 0.9015 mol H2O