Understanding the Concepts

* Molarity (M): Molarity is a measure of concentration, defined as moles of solute per liter of solution.

* Moles (mol): A mole is a unit of amount, representing 6.022 x 10^23 particles (atoms, molecules, etc.).

Formula

Molarity (M) = Moles of solute (mol) / Liters of solution (L)

Solving the Problem

1. Rearrange the formula to solve for Liters:

Liters of solution (L) = Moles of solute (mol) / Molarity (M)

2. Plug in the given values:

Liters of solution (L) = 2.7 mol / 0.30 M

3. Calculate the answer:

Liters of solution (L) = 9 L

Answer: You need 9 liters of a 0.30 M solution to give 2.7 moles of solute.