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What is the molarity of a solution that contains 25.0 g of vitamin B, hydrochloride (with a molar mass of 337 g/mol) in 390 mL of solution?

Respuesta :

cristisp93

Vitamin B solution have a concentration of 0.2 M.

Explanation:

First we need to calculate the number of moles of vitamin B.

number of moles = mass / molecular weight

number of moles of vitamin B = 25 / 337 = 0.0742 moles

To determine the molarity of the solution we use the following formula:

molar concentration = number of moles / volume (L)

molar concentration of vitamin B = 0.0742 / 0.39 = 0.19 ≈ 0.2 M

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molar concentration

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