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10 March, 15:56

Aspirin, C9H8O4, has a molar mass of 180.2 g/mol. A tablet contains 325 mg (0.325 g) of pure aspirin. Show all work

A. how many moles of aspirin are in one tablet

B. How many moles of oxygen are in one tablet of aspirin

C. How many atoms of carbon are in one tablet of aspirin

D. How many grams of oxygen in one tablet of aspirin

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  1. 10 March, 17:24
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    A. how many moles of aspirin are in one tablet

    0.325 g (1 mol / 180.2 g) = 1.80 x 10^-3 mol

    B. How many moles of oxygen are in one tablet of aspirin

    1.80 x 10^-3 mol C9H8O4 (4 mol O / 1 mol C9H8O4) = 7.21 x 10^-3 mol O

    C. How many atoms of carbon are in one tablet of aspirin

    1.80 x 10^-3 mol C9H8O4 (9 mol C / 1 mol C9H8O4) (6.022 x 10^23 atoms C / 1 mol C) = 9.76 x 10^21 atoms C

    D. How many grams of oxygen in one tablet of aspirin

    7.21 x 10^-3 mol O (16 g / mol) = 0.12 g O
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