Question

what is the molarity of 2 moles of a compound dissolved in 4 l of water?
a. 4 m
b. 0.5 m
c. 2 m
d. 1 m

Explanation:

Step1: Recall molarity formula

Molarity ($M$) = $\frac{\text{moles of solute}}{\text{volume of solution in liters}}$

Step2: Identify values

Moles of solute = 2 moles, volume of solution = 4 L

Step3: Calculate molarity

$M=\frac{2}{4}= 0.5\ M$

Answer:

B. 0.5 M