Final answer:
To find which oxide contains the greatest mass of oxygen in 1 g, the fraction of the mass of oxygen in the total mass of the compound is calculated for each. The largest fraction is found in hydrogen peroxide (H2O2), meaning 1 g of H2O2 has the greatest mass of oxygen.
Step-by-step explanation:
We need to determine 1 g of which oxide has the greatest mass of oxygen. To solve this, we calculate the fraction of the mass of oxygen in 1 g of each compound.
- For CO₂, the molar mass is 44.01 g/mol (C=12.01, O=16 each), and one molecule has two oxygen atoms, so the fraction of oxygen is (2 × 16) / 44.01.
- For SO₂, the molar mass is 64.07 g/mol (S=32.07, O=16 each), and the fraction of oxygen is (2 × 16) / 64.07.
- For NO₂, the molar mass is 46.01 g/mol (N=14.01, O=16 each), and the fraction of oxygen is (2 × 16) / 46.01.
- For H₂O₂, the molar mass is 34.02 g/mol (H=1.01 each, O=16 each), and the fraction of oxygen is (2 × 16) / 34.02.
The largest fraction of oxygen by mass is in H₂O₂ (hydrogen peroxide), hence 1 g of H₂O₂ will have the greatest mass of oxygen.