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Yahoo!
 2 years ago
Best ResponseYou've already chosen the best response.0\[moles =\frac{ mass }{ molar mass }\]

theredhead1617
 2 years ago
Best ResponseYou've already chosen the best response.2a "mole" is a measurement of the number of grams in which there are 6.02 x 10^23 atoms/molecules of a substance. The molar mass of NH3 is 17.0306 g/mol. SO, there are 1.468 moles of NH3 in 25 grams. (25/17.0306) 1.468 x (6.02 x 10^23)= 8.837 x 10^23 molecules.
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