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OpenStudy (anonymous):
What is the formula mass of a substance X that weighs 18.0 g and contains 3.21x10^22 molecules? a) 10 g b) 338 g c) 95.9 mg d) none of the above
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OpenStudy (anonymous):
the mole(6.02x10^23) weighs a substance formula unit therefore: |dw:1339607829760:dw| gives you 338g which is B
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