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serious [3.7K]
3 years ago
15

How do you find moles

Chemistry
1 answer:
lesantik [10]3 years ago
5 0
The equation for finding how many moles are in a substance is

moles = mass / relative formula mass,
where mass is measured in g.

The r.f.m. (relative formula mass) is found by adding together all of the atomic masses of the elements in a substance. 

e.g.  CO2 (carbon dioxide) has 1 atom of carbon and two atoms of oxygen.
The relative atomic mass of carbon is approximately 12.
The relative atomic mass of oxygen is approximately 16.

12 + (2 x 16) = 44
The r.f.m. of carbon dioxide is 44.

You would then divide the mass of the substance (how much there is of it) by its r.f.m. to find the mole number.
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scZoUnD [109]

Answer: (C) Vaporizing

Explanation:

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The vaporization process require the largest input of the energy as when the state is in the solid state then, the solid substances contain the strong forces of the attraction and they require high energy to break these strong bonds.

For changing the liquid state into the gases state we require to overcome the surface tension and require enough energy for acquiring the vaporization state.

Therefore, option (C) is correct.

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3 years ago
Why couple should use a method of birth control
Tresset [83]

Answer:

because it will control the birth of a child which can happen alot being overpopulated in the country or world. It also can mange their life and create a small and happy and healthy family.Also the child can get more love and support from their parents if they have less children and it wont be a taruma for the couple as well.  because growing a child can be expensive time costly and really hard.

Explanation:

plz mark me as a brainlest a and thanks my answer

3 0
3 years ago
Which spectroscopic tool would be best for distinguishing a sample of 1,2,2-tribromopropane from 1,1,2-tribromopropane?
12345 [234]

1-H NMR spectroscopy tool will be used for distinguishing a sample of 1,2,2-tribromopropane from 1,1,2-tribromopropane.

The preferred method for determining or validating the structure of organic molecules or those containing protons is H NMR. When compared to other nuclei, a solution-state proton spectrum may be obtained relatively quickly, and it contains a wealth of knowledge regarding a compound's structure.

It can be calculated by simply counting the number of unique hydrogens on one side of the symmetry plane will give you the count of signals individual molecules emit in a 1H NMR spectrum.

Therefore, 1-H NMR spectroscopy tool will be used for distinguishing a sample of 1,2,2-tribromopropane from 1,1,2-tribromopropane.

To know more about 1-H NMR spectroscopy

brainly.com/question/20111886

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5 0
2 years ago
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ludmilkaskok [199]

Answer:

I think the answers are... b, d, and maybe a. I don't know for sure. So only put these answers in if you trust me!

Explanation:

I had this very question, and I put in what I think were the answers.

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2 years ago
Convert 2020 mL to liters
Daniel [21]

Answer:

2.02

Explanation:

5 0
4 years ago
Read 2 more answers
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