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Q.

Aspirin has the formula C9H8O4 How many atoms of oxygen are there in a tablet weighing 360mg?

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a

4.81×1021

b

1.08×1022

c

1.204×1023

d

1.204×1024

answer is D.

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Detailed Solution

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Moles of C9H8O4=360×103180=2×103

Number of O-atoms =2×103×NA×4

=8×6.02×1020=4.81×1021

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