How many hydrogen molecules are in 1.2 moles of hydrogen?

7.22 x 10²³molecules

Explanation:

Given parameters:

Number of moles of hydrogen  = 1.2moles

Unknown:

Number of molecules of hydrogen  = ?

Solution:

From the concept of moles, a mole of a substance contains the Avogadro's number of particles.

       1 mole of a substance  = 6.02 x 10²³ molecules;

So;  1.2 moles of hydrogen  = 1.2 x  6.02 x 10²³ molecules;

                                               = 7.22 x 10²³molecules

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