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.

You know how the first one if filled up like the objects do the same but with the other categories