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saveliy_v [14]
3 years ago
15

Which of the following are considered pure substance??

Chemistry
1 answer:
Shkiper50 [21]3 years ago
7 0

Answer:

Explanation:

I’m 99.9% sure that it’s an element because it can’t be broken down any more than it already is.

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Assuming that both cases describe hydrogen‑like atoms with one electron, for which case is more energy emitted or absorbed?
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Assuming that both cases describe hydrogen‑like atoms with one electron, More energy is emitted or absorbed for case 2. The correct option is D.

<h3>What is emitting of energy, by electron?</h3>

The energy of the electron decreases as it changes levels, and emission of photons happens in the atom.

With the electron moving from a higher to a lower energy level, the photon is emitted. The photon's energy is the same as the energy lost by an electron moving to a lower energy level.

Thus, the correct option is D, More energy is emitted or absorbed for case 2.

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Who wants to be my friend, and I just began
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Benefits of the flea from living on a dog

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They feed on the blood of the dog. They deliver about 4000 eggs on the hosts fur.

3 0
3 years ago
If the reactants of a reaction have ab initial mass of 25 grams what is the mass of the product?
Studentka2010 [4]

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It remains the same

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The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. For example, the mass of sodium plus the mass of chlorine that reacts with the sodium equals the mass of the product sodium chloride.

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