A. 3:2
B. 3.5:1
C. 2:3
D. 2.3:1
Given the mass ratios of iron to oxygen, which of the following samples could be the mineral hematite, Fe2O3?
2018-01-16 6:58 pm
回答 (2)
2018-01-16 7:15 pm
Molar mass of Fe = 55.8 g/mol
Molor mass of O = 16 g/mol
In Fe₂O₃, mass ratio Fe : 0
= 55.8×2 : 16.0×3
= 111.6 : 48
= 111.6/48 : 48/48
= 2.325 : 1
≈ 2.3 : 1
The answer : D. 2.3 : 1
Molor mass of O = 16 g/mol
In Fe₂O₃, mass ratio Fe : 0
= 55.8×2 : 16.0×3
= 111.6 : 48
= 111.6/48 : 48/48
= 2.325 : 1
≈ 2.3 : 1
The answer : D. 2.3 : 1
2018-01-16 7:11 pm
Fe / O = 55.8 x 2 / 16 x 3 = 2.3 (D)
收錄日期: 2021-04-18 18:03:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20180116105818AA1W3ZX