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valina [46]
3 years ago
13

What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations

leading to an answer.
Chemistry
1 answer:
zaharov [31]3 years ago
5 0
The equation would be 4.0cm^3 x 2.7 because for the formula, you need to find the amount of total centimeters and multiply it by 2.7 for each centimeter. 4.0^3 is 64, so the equation would be 64 x 2.7. Do the rest of it and your answer is 172.8
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What does this do to the electrons outside the nucleus in the gaseous atoms
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Answer:

Explanation:

As you know, ionization energy is the energy needed to remove one mole of electrons from one mole of atoms in the gaseous state

X

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Right from the start, you can tell that the harder it is to remove an electron from an atom, the higher the ionization energy will be.

Now, the periodic trends for ionization energy can be describe as follows

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As you mentioned, if you compare the first ionization energies for oxygen and chlorine using these two trends, you will get conflicting results.

If you follow the way ionization energy increases across period, chlorine would have a higher ionization energy, since it's closer to the noble gases.

On the other hand, if you go by how ionziation energy decreases from top to bottom in a group, oxygen would have higher ionization energy, since it's located in period 2, as compared with period 3 for chlorine.

As it turns out, the trend for groups overpowers the trend for periods. As aresult, oxygen will have a higher ionization energy than chlorine.

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Oxygen's outermost electrons are screened by

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