Question

Determine the molar mass for the following molecules/compounds


NaCl H2O O2Zr




Fe2O3 Na2O Cl2

Answer 1

Here are the molar masses (using common atomic weights: H 1.008, O 15.999, Na 22.990, Cl 35.45, Fe 55.845, Zr 91.224):

- NaCl: 22.990 + 35.45 = 58.44 g·mol⁻¹
- H2O: 2×1.008 + 15.999 = 18.015 g·mol⁻¹
- O2Zr (same as ZrO2): 91.224 + 2×15.999 = 123.22 g·mol⁻¹
- Fe2O3: 2×55.845 + 3×15.999 = 159.69 g·mol⁻¹
- Na2O: 2×22.990 + 15.999 = 61.98 g·mol⁻¹
- Cl2: 2×35.45 = 70.90 g·mol⁻¹

If you want these with different atomic weight sources or more significant figures, tell me which and I can recompute.