A 4'972 g sample of wet nickelII sulfate was dried in an oven' The dried solid had a mass of 2'927 g

1
A 4.972 g sample of wet nickel(II) sulfate was
dried in an oven. The dried solid had a mass of
2.927 g. Assuming all of the lost mass is water,
what is the formula of the original wet
nickel(II) sulfate?

• NiSO4 H2O
• NiSO4 2 H2O
• NiSO4 4 H2O
• NiSO4 6 H2O
• NiSO4 8 H2O