describing chemical reactions practice problems answer key
O₂ → 3CO₂ + 4H₂O__ Step-by-step: Carbon atoms: 3 on both sides. Hydrogen atoms: 8 on reactant, 4×2=8 on product. Oxygen atoms: 5×2=10 on reactants, 3×2 + 4=10 on products. 2. Predicting Products of Reactions These problems