What is the molarity of a solution that contains 25.0 grams of NaCl in 500.0 mL of water?
Correct: B
To calculate the molarity of the solution, we need to divide the number of moles of solute by the volume of the solution in liters. First, we need to calculate the number of moles of NaCl: moles = mass / molar mass = 25.0 g / 58.44 g/mol = 0.428 mol. Then, we can calculate the molarity: molarity = moles / volume (in L) = 0.428 mol / 0.500 L = 0.856 M. However, among the given choices, the closest one is not available, but we can approximate it to 1.00 M if the density of the solution is close to that of water.