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KatRina [158]
3 years ago
13

More help please!?!?!?!?!

Chemistry
2 answers:
viva [34]3 years ago
7 0
I think it's D but I'm not sure. The cats are both brown so the phenotype is the same. I took this class a looong time ago
e-lub [12.9K]3 years ago
6 0
It's back wards lol you need to take it right
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5) Calculate the molality of 0.210 mol of KBr dissolved in 0.075kg pure<br> water?
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Answer:

\boxed {\boxed {\sf 2.8 \ m }}

Explanation:

The formula for molality is:

m=\frac{moles \ of \ solute}{kg \ of \ solvent}

There are 0.210 moles of KBr and 0.075 kilograms of pure water.

moles= 0.210 \ mol \\kilograms = 0.075 \ kg

Substitute the values into the formula.

m= \frac{ 0.210 \ mol }{0.075 \ kg}

Divide.

m= 2.8 \ mol/kg= 2.8 \ m

The molality is <u>2.8 moles per kilogram</u>

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