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wlad13 [49]
3 years ago
8

The best cardio respiratory workout is one that

Health
1 answer:
marissa [1.9K]3 years ago
5 0

Answer:

D

Explanation:

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A 3.0% (m/v) potassium chloride solution has a volume of 25.0 mL. How many moles of potassium chloride are in the sample?
Oduvanchick [21]
Using your knowledge of m/v = g/mL, you can start by putting that in the equation as:

\frac{3g}{100mL}

And you know that the volume is 25 mL. So you could put this into the equation as:

\frac{25mL}{1}

And you also know that the molar mass of KCl is 74.55g (K = 39.1 g/mol and Cl = 35.45 g/mol. Add them together to get 74.55g/mol).

We can then put this in the equation as:

\frac{1mol}{74.55g}

Then, we can mulitply them all together:

\frac{3g}{100mL}*  \frac{25mL}{1} * \frac{1mol}{74.55g}=0.01 mol

And now we know that there are 0.01 moles of KCl in the sample.
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o like my friend put me in this headlock today i tapped and he would not let go. So i blacked out and they said i started seizin
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Nutka1998 [239]

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