What mass of styrene (molar mass 104.1 g/mol) contains 4.50 * 1020 molecules of styrene?
A) 7.78 * 10-2 g
B) 7.48 * 104 g
C) 0.00778 g
D) 7.48 * 10-4 g
E) 7.48 *10-3 g
Correct Answer:
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