What is the H₃O⁺ concentration in a solution formed by dissolving 63 g of HNO₃ in 2.0 liters of water?
[molar mass of HNO₃ = 63 g/mol]

Question

What is the H₃O⁺ concentration in a solution formed by dissolving 63 g of HNO₃ in 2.0 liters of water? [molar mass of HNO₃ = 63 g/mol]

Quizplus · Accepted Answer

First, we need to calculate the number of moles of HNO₃: moles = mass/molar mass = 63 g/63 g/mol = 1 mol Next, we need to calculate the concentration: concentration = moles/volume = 1 mol/2.0 L = 0.50 M Therefore, the concentration of H₃O⁺ in the solution is 0.50 M, which corresponds to choice B.

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