A sample of ammonia, NH3, has a mass of 88.0088.00 g. Calculate the number of ammonia molecules in the sample.

3.118x10²⁴ ammonia molecules

Explanation:

First we convert the mass of ammonia to moles, using its molecular weight:

Molecular weight of ammonia = 17 g/mol

Then we convert moles into molecules, using Avogadro's number:

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