Question

Given that the molar mass of NaNO3 is 85.00 g/mol, what mass of NaNO3 is needed to make 4.50 L of a 1.50 M NaNO3 solution? Use mc031-1.jpg.

Answer 1

574 g

Step-by-step explanation:

Answer 2

Ans: Mass of NaNO3 = 574 g

Given:

Volume of NaNO3, V = 4.50 L

Molarity of NaNO3, M = 1.50 M i.e. 1.50 moles/L

Molar mass of NaNO3 = 85.00 g/mol

To determine:

The mass of NaNO3

Step-by-step explanation:

Molarity of a solution can be expressed as the number of moles of the solute in a liter volume of solution

Molarity of NaNO3 = moles of NaNO3/volume of solution in L

1.50 moles/L = moles/4.50 L

moles NaNO3 = 1.50 *4.50 = 6.75 moles

Now, moles of NaNO3 = mass of NaNO3/molar mass NaNO3

mass of NaNO3 = moles * molar mass =

= 6.75 moles * 85.00 g/mole

= 573.75 g = 574 g