What is the correct value for the weight of Na₃PO₄ needed to make 100 mL of a 0.50 molar aqueous solution? A)16.4 g B)8.2 g C)0.05 g D)82 g E)4.1 g

Question

Quizplus · Accepted Answer

First, we need to calculate the number of moles of Na₃PO₄ needed to make the solution: moles = volume(in L) x concentration moles = 0.1 L x 0.50 mol/L moles = 0.05 mol Next, we need to calculate the mass of Na₃PO₄ using its molar mass: mass = moles x molar mass mass = 0.05 mol x (23 + 32 + 16 x 4 + 30 + 14 x 4) g/mol mass = 8.2 g Therefore, the correct answer is B) 8.2 g.

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What Is the Correct Value for the Weight of Na₃PO₄