<u>Answer:</u> The mass of given amount of molecules of copper sulfate is 89.054 grams.
<u>Explanation:</u>
According to mole concept:
1 mole of a compound contains
number of molecules.
The mass of 1 mole of copper sulfate = 159.609 grams
As,
number of molecules have a mass of 159.609 grams.
So,
number of molecules will have a mass of 
Thus, the mass of given amount of molecules of copper sulfate is 89.054 grams.