Q.
In an experiment 4g of M2Ox oxide was reduced to 2.8 g of the metal. Calculate the number of O atoms in the oxide. (Given : Atomic mass of the metal = 56 g mol-1)
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answer is 3.
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Detailed Solution
M2Ox→ReductionM Eq. of M2Ox=eq. of Metal Wt. of M2OxEq.wt. of M2Ox=Wt. of MetalEq. wt. of Metal 42×56+x×162x=2.856x On solving we get, ⇒456+8x=2.856⇒114+2x=120⇒2x = 6 ⇒x = 3
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