Question

A sample of hydrogen nitrate or nitric acid, HNO 3 contains 18.8 x 1022 molecules.

How much mass of nitric acid are in the sample?

Answer 1

19.7 g.

Step-by-step explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to realize this problem can be solved by using a molecules-moles-mass relationship, starting with the given molecules, using the Avogadro's number and the molar mass of nitric acid (63.01 g/mol):

`18.8x10^(22)molec*(1mol)/(6.022x10^(23)molec)* (63.01g)/(1mol) \\\\=19.7g`

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