Question

how many moles of hydrogen are in 3 molecules of copper(II) sulphate pentahydrate

Answer 1

Answer:

Copper

Sulphate pentahydrate 0.25

Answer 2

0.75 moles of hydrogen are in 3 molecules of copper(II) sulfate pentahydrate.

The derivation of 0.75 is as follows:

• For every 1 mole of copper (II) sulfate (CuSO4), 5 moles of water are needed

Therefore,

• Moles of H2O= 5*0.05

• Moles of H2O = 0.25 moles.

Therefore for 3 molecules of CuSO4, 3*0.25=0.75 moles of Hydrogen are required.