4. How many liters of solution would be needed in a 4.5M solution that contains
101.1g of KNO3?

This is someone else’s answer but it answers your question

Molarity is defined as the number of moles of solute dissolved in 1 L of solution.
KNO₃ - 2.0 M this means that 2.0 moles of KNO₃ are in 1 L of solution.
If 1 L contains - 2.0 moles
then 0.50 L contains - 2 mol/L x 0.50 L = 1 mol
Therefore 1 mol of KNO₃ is in 0.50 L solution.

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B"hf and f-"  is the correct answer took the test on edgenuity and got it right