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Q.

A given sample of pure compound  contains 9.81 gm of Zn, 1.8×1023 atoms of chromium and 0.60 moles of oxygen atoms. What is the simplest formula ?

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a

ZnCr2O7

b

ZnCr2O4

c

ZnCrO4

d

ZnCrO6

answer is B.

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Detailed Solution

nZn=9.8165=0.15 nCr=1.8×10236.02×1023=0.3 nO= 0.6 Zn0.15Cr0.3O0.6 ZnCr2O4
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A given sample of pure compound  contains 9.81 gm of Zn, 1.8×1023 atoms of chromium and 0.60 moles of oxygen atoms. What is the simplest formula ?