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2 years ago

At which point on the roller coaster will the car have the greatest amount of Kinetic energy?

Chemistry

1 answer:

Elena-2011 [213]2 years ago

4 0

I’m going to say the answer is most likely X because memetic energy is energy being used at that moment. Because the coaster is going fastest at X we can assume that the answer is X

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Did chimps feed more on seeds or leaves during May?

Naya [18.7K]

Chimps feed on seeds more

6 0

3 years ago

A solution contains 0.021 M Cl and 0.017 M I. A solution containing copper (I) ions is added to selectively precipitate one of t

lidiya [134]

Answer: Copper (I) iodide will precipitate first.

Explanation:

We are given:

$K_{sp}$ of CuCl = $1.0\times 10^{-6}$

$K_{sp}$ of CuI = $5.1\times 10^{-12}$

Concentration of $Cl^-\text{ ion}=0.021M$

Concentration of $I^-\text{ ion}=0.017M$

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

For CuCl:

$K_{sp}=[Cu^+][Cl^-]$

Putting values in above equation, we get:

$1.0\times 10^{-6}=[Cu^+]\times 0.021$

$[Cu^+]=\frac{1.0\times 10^{-6}}{0.021}=4.76\times 10^{-5}M$

Concentration of copper (I) ion = $4.76\times 10^{-5}M$

For CuI:

$K_{sp}=[Cu^+][I^-]$

Putting values in above equation, we get:

$5.1\times 10^{-12}=[Cu^+]\times 0.017$

$[Cu^+]=\frac{5.1\times 10^{-12}}{0.017}=3.00\times 10^{-10}M$

Concentration of copper (I) ion = $3.00\times 10^{-10}M$

For the precipitation of copper (I) ions, we need less concentration of copper (I) ions. So, copper (I) iodide will precipitate first.

7 0

3 years ago

Iodine-131 is a radioactive isotope with a half-life of 8 days. how many grams of a 64 g sample of iodine-131 will remain at the

icang [17]

At the end of 24 days, there will only be 16 g.

7 0

2 years ago

Helium (He), oxygen (O), carbon (C), and selenium (Se) are all nonmetals. Using the periodic table, which pair of these nonmetal

Lisa [10]

Using the periodic table, the pair of non metals that has the most similar properties would be :
Oxygen and Selenium
at the periodic table, these both located on the same period

hope this helps

7 0

3 years ago

Read 2 more answers

53. Why do real gases deviate from the ideal gas laws at low temperatures?

kirill115 [55]

Answer:

The volume occupied by molecules becomes a significant part of the total volume.

Attractions between molecules cause a reduction in volume.

Explanation:

C is wrong. The masses of molecules are constant.

8 0

2 years ago