What is the molarity of a 1.00 cup of tomato juice contains 654 mg of sodium?

To find the molarity of sodium in Tomato Juice, first convert the mass of sodium from milligrams to moles. The molar mass of sodium (Na) is approximately 22.99 g/mol. Thus, 654 mg of sodium is 0.654 g, which is about 0.0285 moles (0.654 g ÷ 22.99 g/mol). Since 1 cup is approximately 0.236 liters, the molarity (M) is calculated as moles of solute divided by liters of solution: M = 0.0285 moles ÷ 0.236 L ≈ 0.121 M.