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Inessa [10]
2 years ago
12

If oxygen has a molar mass of 16.0 g/mole, carbon has a molar mass of 12.0 g/mole and hydrogen has a molar mass of 1.01 g/mole,

how many moles of ethanol do I have, if I have a beaker containing 10.0 g of ethanol (C2H5OH)
Chemistry
1 answer:
Stolb23 [73]2 years ago
5 0
The number of mole of ethanol present in the beaker is 0.217 mole

Description of mole
The mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass

How to determine the mole of C₂H₅OH
From the question given above, the following data were obtained:
Mass of C₂H₅OH = 10 g
Molar mass of C₂H₅OH = (12×2) + (1.01×5) + 16 + 1.01 = 46.06 g/mol
Mole of C₂H₅OH =?

Mole = mass / molar mass
Mole of C₂H₅OH = 10 / 46.06
Mole of C₂H₅OH = 0.217 mole


Learn more about mole:
brainly.com/question/13314627

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3 years ago
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Serhud [2]

Answer:

A

Explanation:

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3 years ago
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IrinaVladis [17]

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Give the outer electron configuration for each of the following columns in the periodic table. 1A,2A,5A,7A Express your answer a
Oliga [24]

Answer:

1A:  ns^1

2A: ns^2

5A: ns^2np^3

7A: ns^2np^5  

Explanation:

<u>According to IUPAC, the columns 1A, 2A, 5A, and 7A correspond to the groups, 1, 2, 15 and 17, respectively</u>.

The outer electron configuration of these columns are the following:

Column    Outer electron configuration

1A              ns^1

2A             ns^2

5A             ns^2np^3

7A             ns^2np^5  

Therefore, for the column 1A the s orbital has only one electron, for the column 2A has the s orbital completed with 2 electrons, for the column 5A the number of electrons in the s orbital is complete (2) and the number of electrons in the p orbital is 3, for the column 7A the s orbital has 2 electrons and the p orbital has 5 electrons.            

I hope it helps you!                      

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