Q.

What mass of the compound CrO3(M=100.0) contains 4.5×1023 oxygen atoms?

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a

25.0 g

b

12.0 g

c

75.0 g

d

2.25 g

answer is C.

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Detailed Solution

Here, the mass of the compound can be calculated as;

W100×3×6×1023=4.5×1023
 

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