Answer:
144
Step-by-step explanation:
The balanced equation would be :
M + 3 O ===> MO3
1 g of oxygen is 1/16 of a mole
It takes 1/3 as many moles of M to complete the reaction , or 1/48 mole
and 1/48 mole is 3 gm so atomic weight is 3 (48) = 144 u
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