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Free_Kalibri [48]
2 years ago
15

What is the mass percentage of C in CH₃CH₂OH? Provide an answer to two decimal places.

Chemistry
1 answer:
tankabanditka [31]2 years ago
5 0

Answer:

here's your answer

Explanation:

Molar mass of CH3CH2OH = 46.06844 g/mol

This compound is also known as Ethanol.

Convert grams CH3CH2OH to moles  or  moles CH3CH2OH to grams

Molecular weight calculation:

12.0107 + 1.00794*3 + 12.0107 + 1.00794*2 + 15.9994 + 1.00794

Percent composition by element  

Hydrogen H 1.00794 6 13.128%

Carbon C 12.0107 2 52.143%

Oxygen O 15.9994 1 34.730%

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Given the reaction:
tino4ka555 [31]

4 moles of NaCl is produced from 2 moles of Na₂CrO₄.

<u>Explanation:</u>

Given reaction is

PbCl₂(aq) + Na₂CrO₄(aq)→ PbCrO₄(s) + 2 NaCl (aq)

It is the balanced equation which means that on both sides of the equation, number of atoms of each element are equal.

From the above balanced equation it says that molar ratio of Na₂CrO₄ to NaCl is 1 : 2.

That is 1 mole of Na₂CrO₄ produces 2 moles of NaCl, so the molar ratio is 1:2.

2 moles of Na₂CrO₄  produces 4 moles of NaCl.

So the molar ratio of Na₂CrO₄ to NaCl is 2: 4.

6 0
3 years ago
Which model best represents an element?
Kobotan [32]
Answer:

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an element is a substance that is entirely made from one type of atom.
7 0
2 years ago
Contrast the silica content of magma in quiet and explosive eruptions
klemol [59]
Magma in quiet eruptions has a low content in silica , while in explosive eruptions, it has a high Content in silica.  A volcano that erupts quietly has  magma that is low in silica. Low-silica magma has low viscosity and flows easily.  A volcano that erupts explosively has magma that is high in silica. High-silica magma has high viscosity, making it thick and sticky, thus it flows slowly.
3 0
3 years ago
Which of the following is not a possible effect of increasing carbon dioxide levels in the atmosphere? a. increase in water cont
nikitadnepr [17]

Answer:

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Explanation:

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Ber [7]

Answer:

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Chemoautotrophs usually inhabit extreme environment such hot vents, deep sea, etc.

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