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zvonat [6]
3 years ago
14

HELP PRETTY PLEASE QUICKLY!!! AND ILL GIVE YOU BRAINLIEST

Chemistry
1 answer:
Yuri [45]3 years ago
8 0

Answer: The answer is C

Explanation: Sound waves tend to spread farther the deeper the sound is, and the waves go lower then the second example, deeming it is louder.

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Oxygen always has an oxidation number of -2 unless it is combined with fluorine or found in the compound peroxide. When in the c
Tpy6a [65]

When oxygen is found is peroxide, it has an oxidation number of -1.

The chemical formula of hydrogen peroxide is H2O2. We know that hydrogen always has +1 oxidation state until it forms metal hydrides. So in H2O2, the oxidation state ofhydrogen is +1.

Now, let oxidation state of oxygen be x. So,

2 * (+1) + 2*x = 0

2 + 2x = 0

2x = -2

x = -2 / 2

x = -1

Hence, the oxidation number of oxygen in peroxides is -1

6 0
3 years ago
Is a diamond a homogeneous or heterogeneous mixture?
Ivanshal [37]

Answer:

It's a heterogeneous mixture.

Explanation:

Diamond is made of just one element: carbon. Each carbon atom in diamond is connected to four other carbon atoms, in a crystal that extends on and on. There are other forms of pure carbon where the atoms are bonded differently, notably charcoal and graphite.

7 0
3 years ago
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What structure do all of these elements have in common?
Dmitrij [34]
The answer is c because of going left to right
7 0
3 years ago
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If you were able to magnify a penny down to the atomic level, what two
Lena [83]

The two observations you would make about the atoms are

  1. They are made up largely of empty space
  2. Their mass is concentrated at the center called a nucleus

These observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.

Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.

So,

The two observations you would make about the atoms are

  1. They are made up largely of empty space
  2. Their mass is concentrated at the center called a nucleus

Learn more about the atom here:

brainly.com/question/24873449

7 0
3 years ago
Carbon-14 naturally decays to carbon
barxatty [35]

Answer:

Carbon-14 naturally decays to Carbon-12

Explanation:

8 0
2 years ago
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