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## anonymous 4 years ago How many molecules are in 25 grams of NH3??

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1. anonymous

Find no of moles forst

2. anonymous

*first

3. anonymous

$moles =\frac{ mass }{ molar mass }$

4. anonymous

a "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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