1. The problem statement, all variables and given/known data What would be the mass of oxygen in 2.5 x 102 g in CaCO3? Given: Mass 2.5 x 102 Molar Mass of CaCO3 which is 100.09 g/mol. 2. Relevant equations mo=molar mass x number of o 3. The attempt at a solution mo=100.09 g/mol x 3 mo=300.27 g of oxygen Can someone tell me if I got this right? Thank you.