How many oxygen atoms are in a 125 mg sample of aspirin? The molar mass of aspirin is 180.15 g/mol and its molecular formula is C9H8O4.
a) 4.18 × 1023
b) 4.18 × 1020
c) 1.67 × 1021
d) 1.36 × 1025
e) 8.68 × 1023
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