Problem: If 4.05 x 1023 molecules of a substance have a mass of 86.2 g, what is the molar mass of the substance? A)  128 g/mol B)  3.49 x 1025 g/mol                                    C)  2.13 x 1022 g/mol D)  4.70 x 1021 g/mol           E)  58.0 g/mol

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If 4.05 x 1023 molecules of a substance have a mass of 86.2 g, what is the molar mass of the substance?

A)  128 g/mol

B)  3.49 x 1025 g/mol

C)  2.13 x 1022 g/mol

D)  4.70 x 1021 g/mol

E)  58.0 g/mol

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