I Really Need Help With This Chemistry Lab Especially The Last Page Questions 79!

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7. What mass of Nickel II fluoride could be
found in 42.1 me of the solution ?
8. The other student adds 27.0 nd of water to
40.0 ml of the original solution. What concentration
( in molen/ ( ) do you think she achieved ?
9 . What would you predict to be the concentration
Nickel lens and fluoride ions in the solution
which was the result of the dilution in #8 clove ?Science