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Feliz [49]
3 years ago
11

What evidence do we have that energy levels in an atom are quantized? State and explain the evidence.

Chemistry
1 answer:
liberstina [14]3 years ago
8 0

Answer:

The first evidence of quantization in atoms was the observation of spectral lines in light from the sun in the early 1800s by Joseph von Fraunhofer and William Hyde Wollaston.

Explanation:

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9.0 mol Na2S can from 9.0 mol CuS and 8.0 mol CuSO4 can form 8.0 mol Cus.
ICE Princess25 [194]

Answer:

765.0 grams CuS

Explanation:

The limiting reagent is the reactant which completely reacts before the other reactant(s) is used up. When 9.0 moles Na₂S and 8.0 moles CuSO₄ react, it appears that CuSO₄ is the limiting reagent. You can tell because it results in the production of less product.

You can determine the mass of CuS by multiplying the moles by the molar mass. It is important to arrange the ratio in a way that allows for the cancellation of units.

Molar Mass (CuS): 95.62 g/mol

8.0 moles CuS               95.62 g
-------------------------  x  -----------------------  =  765.0 grams CuS
                                         1 mole

4 0
2 years ago
Which term describes the materials magma is made of?
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Answer:

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What happens at night?​
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3 years ago
What is an example of an inert element?​
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Answer:

There are some like Argon, Helium, and Krypton.

Explanation:

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