Hi, -------------- Sorry for the late reply, I was on may annual vacation. H = 1 multiply be 2 (since there is 2 atoms of Hydrogen in each molecule of H2CO3). Carbon (C) is 12. and Oxygen O = 16 (since there are 3 atoms of O in each H2CO3 mulecule you'll have to multiply: 16 * 3 = 48). Hope it's clear by now (if not, plese, don't hesitate to ask more). ------------- Best regards,
