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0.789 mol of a particular substance weighs 142 g. What is the molar mass of this substance?

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0.789 mol of a particular substance weighs 142 g. What is the molar mass of this substance?

0.789 mol of a particular substance weighs 142 g. What is the molar mass of this substance?
a. 0.00556 g c. 180 g
b. 0.00556 amu d. 180 amu

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