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goldenfox [79]
2 years ago
8

Which of the following is an example of the conversion of kinetic energy into gravitational potential energy?

Chemistry
1 answer:
Alisiya [41]2 years ago
4 0
A) a person walking up a hill .
walking => moving => having some velocity/speed => having KE ...

up => height(h) increases => PE = mgh increases .

thus , the KE got converted into Gravitational PE as the person walks up the hill.
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Name two compounds with more exothermic lattice energies than scandium oxide and justify your choice.
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Answer:

1 . Al_2O_3

2. TiO_2

Explanation:

The more stable the ionic compound, the more is it lattice energy.

  • The more the charge on the cation and the anion, the greater is the lattice energy.
  • The less the size of the cation and the anion, the greater is the lattice energy.

Scandium oxide (Sc_2O_3) is an oxide in which Sc^{3+} behaves as cation and O^{2-} behaves as anion.

The compounds which has higher lattice energy than scandium oxide are:

1 . Al_2O_3

This is because the charge are same on the cation and the anion as in the case of the Scandium oxide but the size of the cation Al^{3+} is smaller than Sc^{3+}. Thus, this corresponds to higher lattice energy.

2. TiO_2

This is because the charge on the cation Ti^{4+} is greater than that of Sc^{3+} and also the size of the cation Ti^{4+} is smaller than Sc^{3+}. Thus, this corresponds to higher lattice energy.

3 0
3 years ago
Please help fast thank yuo
Masteriza [31]

Answer:

what is your question tell may i can help you

7 0
2 years ago
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How many liters are in 5.42 mols of O2 gas?<br><br> (2 decimal places)
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Explanation:

1 mol = 22.4 l

5.42 mol = 22.4 × 5.42 = 121.408

in two decimal place it is 121.41

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In the formula CO2, what does the subscript 2 after the O mean
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