Answer:
11.5856g
Explanation:
We have been asked to find the mass of CuSO4 which contains 4.50 x 10^22 formula units.
But we know that one mole of a substance contains 6.02 x 10^23 formula units.
Hence 4.50 x 10^22 formula units contains x moles.
x = (4.50 x 10^22)/(6.02 x 10^23) moles
= 0.074750 moles
To find the mass of CuSO4 we use the formula,
mass = moles x formula mass
= (0.074750 x 154.99) g
= 11.5856g
Therefore the mass of CuSO4 containing 4.5 x 10^ 22 formula units is 11.5856g.
