Question

30. What are the number of molecules of water in
CuSO4.5H20, if the weight of oxygen in it is 36 grams?
a13.25 X 1023
b) 5.25 X 1023
c)7.52×1023
d)9.52×1023​

Answer 1

Answer:

I think the answer is 1.25*10^23

Explanation:

1 mole of CuSO4.5H20 has 9*16 g of oxygen if we have 36 grams of oxygen

then we have 36/9*16 moles of CuSO4.5H20

i.e 1/4 moles

now 1 mole of CuSO4.5H20 has 5 h20

so 1/4 will have 5/4 moles of h20

or 5/4*10^23