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08-07-2016
Chemistry

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What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution? Show all of the work needed to solve this problem.

Respuesta :

Willchemistry Willchemistry

09-07-2016

Molar mass KCl = 74.55 g/mol

Volume = 869 mL in liters : 869 / 1000 => 0.869 L

number of moles:

21.9 / 74.55 => 0.293 moles

M = n / V

M = 0.293 / 0.869

M = 0.337 mol/L⁻¹

hope this helps!

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