A sample of aluminium sulfide, Al2S3, contains 0.25 mol of sulfur atoms. The total mass of aluminium in the sample is?
回答 (1)
2016-06-13 8:51 am
✔ 最佳答案
In Al₂S₃, mole ratio Al : S = 2 : 3No. of moles of Al = (0.25 mol) × (2/3) = 0.50/3 mol
Molar mass of Al = 26.98 g/mol
Mass of Al = (26.98 g/mol) × (0.50/3 mol) = 4.5 g
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