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if 1.97 x10^23 molecules of a substance have a mass of 5.73 grams what is the...

if 1.97 x10^23 molecules of a substance have a mass of 5.73 grams what is the molar mass of the substance?

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Answer #1

1.97 x10^23 molecules mass = 5.73 grams then

6.023 X 10^23 (1 mole) molecules mass = (5.73 X 6.023 X 10^23)/1.97 x10^23

                                                  = 17.5 grams.

molar mass of the substance = 17.5 grams.

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