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What is the molality of a solution containing 15.0g NaCl dissolved in 50.0g water?
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What is the molality of a solution containing 15.0g NaCl dissolved in 50.0g water?
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Apr 18, 2018
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What is the molality of a solution containing 15.0g NaCl dissolved in 50.0g water?
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Answer:
C. 5.17
Step-by-step explanation:
Thomaus
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Apr 20, 2018
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Hey there!
Molar mass NaCl = 58.44 g/mol
number of moles:
n = m / mm
n = 15.0 / 58.44
n = 0.2566 moles of NaCl
Volume in Kg :
50.0 g / 1000 => 0.05 Kg
Therefore :
Molality = moles of solute / volume
Molatity = 0.2566 / 0.05
Molality = 5.132 mol/kg
Einpoklum
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Apr 21, 2018
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