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andreyandreev [35.5K]
3 years ago
11

A mole is the amount of a substance that contains as many particles as the number of atoms in 12 grams of what isotope?

Chemistry
1 answer:
ioda3 years ago
3 0
The <span>12C</span><span> isotope.  Hope this helps.</span>
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What is the energy of an electron in the third energy level of hydrogen?
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Answer:

Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy.

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Energy Levels of Electrons.

Energy Level Energy

1 -13.6 eV

2 -3.4 eV

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3 years ago
You place a carrot in salt water for 24 hours. what do you observe at the end of dat time? choose TWO CORRECT answer.
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it will be shriviled due to the process called osmosis

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Is this showing a lunar or solar eclipse? Explain what is happening from the viewpoint of Earth.
GalinKa [24]

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Solar eclipse

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2 years ago
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What type of chemical bond involves the sharing of a pair of electrons by two atoms in a molecule.
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Covalent bond.

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In this example, since the atoms are sharing atoms, the chemical bond between them would be a covalent bond.

4 0
2 years ago
A 200. 0-ng sample of sodium-24 was stored in a lead-lined cabinet for 45 hours. The half-life of sodium-24 is 15 hours. How muc
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