Question

64.92 grams of Hg(NO3)2 to make 5.00 liters of solution.

Answer 1

Answer:

          $\large\boxed{\large\boxed{0.0400mol/liter}}$

Explanation:

Knowing that you have 64.92 grams of Hg(NO₃)₂ to make 5.00 liters of solution, you can calcualte the molarity of the solution.

Molarity is a measure of concentration, defined as the number of moles of solute per liter of soluiton. Mathematically:

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

Then, first you must calculate the number of moles of solute. The formula is:

        $\text{number of moles}=\frac{\text{mass in grams}}{\text{molar mass}}$

You can either calculate the molar mass of the compound using the chemical formula or search it in the internet.

The molar mass of Hg(NO₃)₂  is found to be 324.7 g/mol.

Now you have everything to calculate the molarity of the solution:

• $\text{number of moles}=\frac{64.92g}{324.7g/mol}=0.199977mol\approx 0.200mol$

• $Molarity=\frac{0.19977mol}{5.00liters}\approx0.0400mol/liter$