M of CH2O= 12+2+16=30 g/mol
So 30g/mol = 3.5 mol
=> 16g/mol*3.5 divide by 30 = 1.86 mol
I think
Answer : The volume of solution will be 2.96 liters.
Explanation :
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :

In this question, the solute is NaF.
Now put all the given values in this formula, we get:



Therefore, the volume of solution will be 2.96 liters.
Oxidation-reduction (redox) reaction