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Whelan Whelan
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Posts: 3158
7 years ago
At 25.0°C, a solution has a concentration of 3.179 M and a density of 1.260 g/mL. The density of the solution at 50.0°C is 1.249 g/mL. What is the molarity of the solution at 50.0°C?
A) 2.545 M
B) 3.151 M
C) 3.179 M
D) 3.230 M
Textbook 

Introductory Chemistry Essentials


Edition: 5th
Author:
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hbutler2hbutler2
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Posts: 3070
7 years ago Edited: 2 months ago, bio_man
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B

Molarity is (Moles of Solute)/(Liters of Solution)

I'm pretty sure your first question is simply a proportion because its based off the same solution.

Therefore (3.179 M)/(1.260g/mL) = (X)/(1.249g/ml)

X = (3.179M)/(1.260g/mL)*(1.249g/mL) = 3.151 M at 50*C
1
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2 months ago
Thank you so much
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