3. Calculate how many grams of bromine are in 3.28 moles of bromine.

There is 262.4 grams of Br in 3.28 moles of Br.

Explanation:

As we know, 6.023*10^23 atoms or molecules of any element is equal to its atomic or molecular weight.  And, 6.023*10^23 atoms of any element is also equal to 1 mole of the same element.1 mole of an element Br is equal to 79.904 nearly 80 grams.3.28 moles of Br is equal to 3.28* 80 gramsTherefore, 3.28 moles of Br is equal to 262.4 grams of Br.Or, we can say there is 262.4 grams of Br in 3.28 moles of Br.