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Sedaia [141]
3 years ago
6

Both s-cis and s-trans conformers of 1,3-butadiene have a continuous conjugated π system, which of the following statements is t

rue about the s-cis conformer?
The s-cis conformer is lower in energy than the s-trans conformer
The s-cis conformer is higher in energy than the s-trans conformer.
The s-cis conformer has equal energy as the s-trans conformer.
None of these.
Chemistry
1 answer:
alexandr1967 [171]3 years ago
5 0

Answer:

second option (B)

Explanation:

The s-cis conformer is higher in energy than the s-trans conformer. The most stable conformer has bent-inward geometry which favors the π bond interaction with methyl/methylene hydrogen/carbon atom hence more crowding with consequent higher energy, this is also responsible for the higher boiling point of the s-cis conformer.

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Pro exercise con suffication

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How many liquids are found on the periodic table?<br><br><br><br> 1
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3 years ago
In a titration of 47.41 mL of 0.3764 M ammonia with 0.3838 M aqueous nitric acid, what is the pH of the solution when 47.41 mL +
Volgvan

<u>Answer:</u> The pH of the solution is 1.136

<u>Explanation:</u>

To calculate the moles from molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

  • <u>For ammonia:</u>

Molarity of ammonia = 0.3764 M

Volume of ammonia = 47.41 mL = 0.04741 L   (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

0.3764mol/L=\frac{\text{Moles of ammonia}}{0.04741L}\\\\\text{Moles of ammonia}=0.01784mol

  • <u>For nitric acid:</u>

Molarity of nitric acid = 0.3838 M

Volume of ammonia = (47.41 + 10.00) mL = 57.41 mL= 0.05741 L

Putting values in above equation, we get:

0.3838mol/L=\frac{\text{Moles of nitric acid}}{0.05741L}\\\\\text{Moles of nitric acid}=0.02203mol

After the completion of reaction, amount of nitric acid remained = 0.022 - 0.0178 = 0.0042 mol

For the reaction of ammonia with nitric acid, the equation follows:

                       NH_3+HNO_3\rightarrow NH_4NO_3

At t=0             0.0178   0.022

Completion        0     0.0042        0.0178

As, the solution of the reaction is made from strong acid which is nitric acid and the conjugate acid of weak base which is ammonia. So, the pH of the reaction will be based totally on the concentration of nitric acid.

To calculate the pH of the reaction, we use the equation:

pH=-\log[H^+]

where,

[H^+]=\frac{0.0042mol}{0.05741L}=0.0731M

Putting values in above equation, we get:

pH=-\log(0.0731)\\\\pH=1.136

Hence, the pH of the solution is 1.136

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Answer:

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1. A charged group of covalently bonded atoms is known as
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