Number Of Moles And Molecules In 0.500g Tablet Of Aspirin
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Number Of Moles And Molecules In 0.500g Tablet Of Aspirin

The chemical name for aspirin is acetylsalicyclic acid. Its molecular formulas is HC9H7O4.

(a) How many moles of HC9H7O4 are in 0.500 g tablet of aspirin?
(b) How many molecules of HC9H7O4 are in this aspirin tablet?

The strings: S7P1A15 (containership - mass).

The math:
Pj Problem of Interest is of type containership (mass).

(a) Molar mass of HC9H7O4 = 1 + 108 + 7 + 64 = 180 g
So, 0.500 g of aspirin is 0.500/180 = 0.00277 mol of aspirin.

(b) 1 mole contains the Avogadro number of molecules = 6.02 x 1023 molecules
So, 0.00277 mol will contain 0.00277 x 6.02 x 1023 = 0.0167 x 1023 = 1.67 x 1021 molecules of aspirin.

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