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Subjects
Science CBSE
Class 9
Atoms and molecules
Textbook based HOTS
17.
Multiple Choice Question Answer XVII
Exercise condition:
2
m.
1.
The percentage of an element M is 53 in its oxide of molecular formula \(M_2O_3\). Its atomic mass is about
91
27
45
18
2.
The formula unit mass of \(K_2CO_3\) is (Given atomic mass of K = 39 u, C = 12 u, O = 16 u)
128 u
78 u
138 u
67 u
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