1. What is the molarity of a solution that was prepared by dissolving 142 g of NaNO_(3) (molar mass=85.0g/mol) in enough water to make 350 mL of solution?

To find the molarity of the solution, we need to calculate the number of moles of dissolved in the solution and then divide it by the volume of the solution in liters.Given information:- Mass of dissolved: 142 g- Molar mass of : 85.0 g/mol- Volume of the solution: 350 mL (0.35 L)Step 1: Calculate the number of moles of dissolved.Number of moles = Mass / Molar massNumber of moles = 142 g / 85.0 g/mol = 1.67 molStep 2: Calculate the molarity of the solution.Molarity = Number of moles / Volume of the solution in litersMolarity = 1.67 mol / 0.35 L = 4.77 MTherefore, the molarity of the solution is 4.77 M.