A given sample of a pure compound contains 9.81 g of zinc, 1.8×1023 atoms of chromium and 0.6 mole atoms of oxygen. What is the empirical formula of the compound ?
[Atomic mass : Zn=65.4,Cr=52,O=16]
A
ZnCr2O7
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B
ZnCr2O4
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C
ZnCrO4
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D
ZnCr2O6
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Solution
The correct option is AZnCr2O4 Number of moles of Zn=9.8165.4=0.15mol