Question

Explain the method of calculating the number of copper sulphate (CuSO4) molecules in a crystal.. (atomic masses- calcium=40 sulphur=32 oxygen=16)

Answer 1

they have to add all.
CU + S + 4*O
putting the value of all the three we get
40+32+4*16
72+64
136

Answer 2

Answer:

The correct answer is 160.

Explanation:

To find out the number of 'copper sulfate' (CuSO4) molecules in a crystal, we need the atomic weight of each of the Copper Sulphate molecule.

The 'atomic weight' of Cu is 64, the 'atomic weight' of S is 32 and the 'atomic weight' of Oxygen is 16.

So adding all these, as per the formula of the compound, CuSO4, the answer is as follows:

= 64 + 32 + (16x4)

= 64 + 32 + 64

= 160