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Q.

A certain compound has the molecular formula X4O6. If  10.0 g of the compound contains 5.62g of X, the atomic mass of X is 

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a

32.0 amu

b

62.0 amu

c

30.8 amu

d

48.0  amu 

answer is D.

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Detailed Solution

if x is atomic mass, then 4x4x+96u×10g=5.62g which gives  x=30.8u

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