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Leokris [45]
3 years ago
8

Which of the following observations is usually not evidence of a chemical change ?

Chemistry
1 answer:
Nookie1986 [14]3 years ago
5 0

Answer:

D

Explanation:

Have a nice day

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The diagram shows Niels Bohr’s model of an atom.
PtichkaEL [24]

Answer:

Energy is absorbed, and an emission line is produced.

Explanation:

Electrons are present and revolving continuously in the orbits that are present around the nucleus. The energy of electron are fixed and unable to move to other orbits due to the strong attractive force of the proton which is present in the nucleus of the atom. If the electron wants to jump from the first energy level to the second energy level, so the electron has to absorb enough energy which can overcome the attractive force of proton.

4 0
3 years ago
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How many oxygen atoms are in one molecule of baking soda
8_murik_8 [283]

NaHCO3 = No. of atoms are 1 sodium + 1 Hydrogen + 1 carbon + 3 oxygens = 6 atoms per molecule.

so a total of 3 oxygens

4 0
3 years ago
The majority of energy used in industrialized countries is produced using renewable resources.
vaieri [72.5K]

Answer:

The answer is FALSE

Explanation:

I took the test and it was false,

also if it was true then in industrialized countries would be more eco-friendly and there wouldn't be a huge hole in our ozone layer. and no more wars over oil.

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3 years ago
What is the volume of a gas at 756.14 Torr. If the volume was 588.56 mL at 588.56 torr.
creativ13 [48]

Answer:

Explanation:

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3 years ago
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8. Which is a nonrenewable resource?
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Coal

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Once it's all been mined, there's no more. It's not like we grow it.

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2 years ago
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