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erma4kov [3.2K]
3 years ago
15

I NEED HELP PLEASE, THANKS! :)

Chemistry
1 answer:
saw5 [17]3 years ago
3 0

Answer:

Macroscopic observation

Explanation:

The observation is macroscopic because you could observe the transformation with the naked eye.

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If the atomic mass is 14 and the atomic number is 7,how many neutrons do you have?​
Nitella [24]

Answer: 7 neutrons

Explanation: Atomic number refers to the number of protons in the nucleus of the atom. Also you can treat atomic mass as how many particles (protons and neutrons) are in the nucleus of the atom. So for this problem:

14 particles - 7 protons = 7 neutrons (and we know all that's left over is neutrons because we subtracted all the protons)

8 0
3 years ago
The molar mass of c3h8o2 (four significant figures) is ________.
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3 years ago
7. I'm full of holes, yet flexible and thin. I control what gets out as well as what comes in...​
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3 years ago
What is a physical change and what are several common examples?
leva [86]

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1.will not

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5 0
4 years ago
What is the molarity of a solution formed when you add 200. Ml of water to 50. Ml of 5. 0 m hcl
Gnesinka [82]

The molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

<h3>How to calculate molarity?</h3>

The molarity of a solution can be calculated using the following formula:

M1V1 = M2V2

Where;

  • M1 = molarity of a base
  • M2 = molarity of acid
  • V1 = volume of base
  • V2 = volume of acid

M1 × 200 = 50 × 5

200M1 = 250

M1 = 250/200

M1 = 1.25M

Therefore, the molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

Learn more about molarity at: brainly.com/question/12127540

6 0
2 years ago
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