Question

2 points

Answer 1

Answer:

The molarity is 0.0174 $\frac{moles}{liter}$

Explanation:

Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution.

$Molarity=\frac{number of moles of solute}{volume of solution}$

Molarity is expressed in units $\frac{moles}{liter}$.

In this case, being the molar mass of compound Pb(C₂H₃O₂)₄ equal to 443.38 g / mol, then the following rule of three can be applied: if 443.38 grams are contained in 1 mol, 2.7*10⁻² grams in how many moles they are present?

$amount of moles=\frac{2.7*10^{-2} grams*1 mol}{443.38 grams}$

amount of moles= 6.09*10⁻⁵ moles

Being 1,000 mL= 1 L, then 3.5 mL= 3.5*10⁻³ L

So:

$Molarity=\frac{6.09*10^{-5} moles}{3.5*10^{-3} L}$

Solving:

Molarity=0.0174 $\frac{moles}{liter}$

The molarity is 0.0174 $\frac{moles}{liter}$