Question

What is the molarity of 2 moles of a compound dissolved in 4 L of water?

Answer 1

Answer:

$\boxed {\boxed {\sf B. \ 0.5 \ M}}$

Explanation:

Molarity is a measure of concentration in moles per liter. The formula for calculating molarity is:

$molarity= \frac{moles \ of \ solute}{ liters \ of \ solution}$

There are 2 moles of a compound or the solute. There are 4 liters of water or the solution.

• moles of solute= 2 mol
• liters of solution = 4 L

Substitute the values into the formula.

$molarity = \frac{ 2 \ mol}{ 4 \ L}$

Divide.

$molarity= 0.5 \ mol /L$

1 mole per liter is equal to 1 Molar, so the solution's molarity of 0.5 mol/L is equal to 0.5 M.

$molarity = 0.5 \ M$

The molarity of the solution is 0.5 Molar and choice B is correct.