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irina1246 [14]
3 years ago
6

What is the total number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne?

Chemistry
2 answers:
NemiM [27]3 years ago
8 0
The total number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne is 3.
kenny6666 [7]3 years ago
8 0

Answer : The correct option is, (3) 3

Explanation :

The given molecule is, Ethyne

As we know that ethyne is an unsaturated hydrocarbon which contains triple bonds between the carbon-carbon atoms.

In unsaturated compounds, there are less number of hydrogen bonded with the carbon atoms.

The formula of ethyne molecule is, C_2H_2. In this molecule, there are triple bond is present between the two carbon atoms that means there are 3 pair of electrons present between the two carbon atoms.

Hence, there are 3 number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne.

The structure of ethyne are shown below.

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Pressure=3.91atm

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As given in the question that gas is ideal so

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P1=2.5 atm

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2.5\times 2V=nR \times 320..............(1)

P\times V=nR \times 250................(2)

eqn2/eqn1

\frac{P}{2.5} \times \frac{1}{2} =\frac{250}{320}

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When 3243. grams of iron (III) chloride are reacted with 511.8 grams of hydrosulfuric acid, which is the limiting reactant?
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Hydrosulfuric acid will act as limiting reactant.

Explanation:

Given data:

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Mass of hydrosulfuric acid = 511.8 g

Limiting reactant = ?

Solution:

Chemical equation:

2FeCl₃ + 3H₂S       →       Fe₂S₃ + 6HCl

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Number of moles of hydrosulfuric acid:

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Now we will compare the moles of both reactant with products

                      FeCl₃          :          Fe₂S₃

                       2                :            1

                      20               :          1/2 ×20 = 10

                      FeCl₃          :            HCl

                       2                :              6

                      20               :          6/2 ×20 = 60

                      H₂S             :          Fe₂S₃

                       3                :            1

                      15               :          1/3 ×15 = 5

                      H₂S            :            HCl

                       3                :              6

                      15                :          6/3 ×15 = 30

Hydrosulfuric acid producing less number of moles of product thus, it will act as limiting reactant.

 

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