Problem: 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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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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