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3 years ago

Which sample has particles with the lowest average kinetic energy?

Chemistry

2 answers:

Thepotemich [5.8K]3 years ago

7 0

Answer : Option 4) 9.0 g of $I_{2}$ at 20°C

Explanation : Usually the average kinetic energy depends upon the state of the matter. Considering about the iodine at lower temperature the kinetic energy is found to be low. Whereas at higher temperature has higher kinetic energy value.

From the kinetic energy equation it can be easily related that K.E. is directly proportional to the temperature.

Refer the attached image for the relationship of temperature with kinetic energy.

Anastasy [175]3 years ago

3 0

The question asks average kinetic energy. So it is only related with the temperature. The higher temperature is, the higher kinetic energy is. So the answer is (4).

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An acid with molar mass 84.48 g/mol is titrated with 0.650 M KOH. What volume of KOH solution is needed to titrate 1.70 grams of

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Answer:

$V=0.0310L=3.10mL$

Explanation:

Hello.

In this case, since the acid is monoprotic and the KOH has one hydroxyl ion only, we can see that at the equivalence point the moles of both of them are the same:

$n_{acid}=n_{KOH}$

Thus, since we are given 1.70 g of the acid, we compute the moles of acid that were titrated:

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$V=\frac{0.0201mol}{0.650mol/L}\\\\V=0.0310L=3.10mL$

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