Labels:text | screenshot | font | diagram | number | line | parallel OCR: How many moles of water molecules in 72 gms of pure water (H,0) ? 15 4.0 moles H 1.007 12 8 The periodic table shows that one mole 0 of H2 0 has a mass of about 18.0gms. 15.999 Moles H20 = 72 gms/18.0gms/mol 18.0gms 0.4.0 moles