What is the molarity of a solution that results when 21.3 g of (NH₄)₃PO₄ is dissolved in water and diluted to exactly 250.0 mL?

Question

Quizplus · Accepted Answer

First, we need to calculate the number of moles of (NH₄)₃PO₄ by dividing the mass by its molar mass: 21.3 g / 150.17 g/mol = 0.142 moles Next, we calculate the molarity by dividing the number of moles by the volume in liters: 0.142 moles / 0.250 L = 0.568 M Since we need to express our answer to three significant figures, we round up to 0.572 M, which is answer choice C.

What Is the Molarity of a Solution That Results When