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3 years ago

If you have a 8.6 mol of AlCl3 in a 6.8 M solution, how many Liters does it make?

Chemistry

1 answer:

Nana76 [90]3 years ago

7 0

Answer: 1.3 L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

To calculate the volume for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{moles of solute}}{\text{Volume of solution in L}}$

$6.8M=\frac{8.6mol}{\text{Volume of solution in L}}$

$\text{Volume of solution in L}=1.3$

Thus the volume in Liters is 1.3

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The experiment above is repeated, but instead of extracting once with 6 mL the extraction is done three times with 2 mL of dichl

nevsk [136]

Complete Question

A student is extracting caffeine from water with dichloromethane. The K value is 4.6. If the student starts with a total of 40 mg of caffeine in 2 mL of water and extracts once with 6 mL of dichloromethane

The experiment above is repeated, but instead of extracting once with 6 mL the extraction is done three times with 2 mL of dichloromethane each time. How much caffeine will be in each dichloromethane extract?

Answer:

The mass of caffeine extracted is $P = 39.8 \ mg$

Explanation:

From the question above we are told that

The K value is $K = 4.6$

The mass of the caffeine is $m = 40 mg$

The volume of water is $V = 2 mL$

The volume of caffeine is $v_c = 2 mL$

The number of times the extraction was done is n = 3

Generally the mass of caffeine that will be extracted is

$P = m * [\frac{V}{K * v_c + V} ]^3$

substituting values

$P = 40 * [\frac{2}{4.6 * 2 + 2} ]^3$

$P = 39.8 \ mg$

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3 years ago

A force of 20 N acts upon 5 kg block caculate the accerleration of the object

Vedmedyk [2.9K]

Answer:

$\boxed{\text{4 m $\cdot$ s$^{-2}$}}$

Explanation:

F = ma

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Answer:

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valentinak56 [21]

Answer:

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Explanation:

iodous acid would also be known as HIO2

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