Question

part a
if 3.00 l of a 5.20 m mgbr₂ solution is diluted to 39.0 l, what is the molarity of the diluted solution?
express the molarity to three significant figures.

Explanation:

Step1: Recall dilution formula

$M_1V_1 = M_2V_2$

Step2: Identify given values

$M_1 = 5.20\ M$, $V_1=3.00\ L$, $V_2 = 39.0\ L$

Step3: Solve for $M_2$

$M_2=\frac{M_1V_1}{V_2}=\frac{5.20\ M\times3.00\ L}{39.0\ L}$
$M_2 = 0.400\ M$

Answer:

$0.400$