Answer:
26.98g/mol
Explanation:
The molar mass of M2O3 = 2M + 3O = 2M +(3x16) = 2M + 48
From the question, we were told that the mass percentage of M is 52.92%. This can be expressed below:
Mass of M/MM of oxide = 52.92%
2M / 2M + 48 = 52.92/ 100
Cross multiply to express in linear form
2M x 100 = 52.92(2M + 48)
200M = 105.84M + 2540.16
Collect like terms
200M — 105.84M = 2540.16
94.16M = 2540.16
Divide both side by 94.16, we have:
M = 2540.16 / 94.16
M = 26.98
The atomic weight of M is 26.98g/mol
