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Lyrx [107]
4 years ago
8

What alkene reacts the fastest with HBr?

Chemistry
2 answers:
weeeeeb [17]4 years ago
6 0

Explanation:

The reaction with HBr is a nucleofilic adition with the following steps:

  • Step 1: Carbocation formation
  • Step 2: Product formation (addition of Br-)

In the first step, the more sustituted the carbocation is the more stable. Meaning this that the most stable will be a terciary C (such as in ter buthene), the  less stable the primary C (ethene for example) and between them, the secondary C (propene).

Analizing that and knowing that this mechanism of reaction follows the rule of Markovnikov, you can determine the reaction speed of an alkene.

Also the more resonance intermediates it has, the slower the reacrion is.

Rasek [7]4 years ago
3 0
The first step in the reaction is the double bond of the Alkene going after the H of HBr. This protonates the Alkene via Markovnikov's rule, and forms a carbocation. The stability of this carbocation dictates the rate of the reaction. 

<span>So to solve your problem, protonate all your Alkenes following Markovnikov's rule, and then compare the relative stability of your resulting carbocations. Tertiary is more stable than secondary, so an Alkene that produces a tertiary carbocation reacts faster than an Alkene that produces a secondary carbocation.


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span>
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A weather balloon is filled with helium that occupies a volume of 3.93 104 L at 0.995 atm and 32.0°C. After it is released, it r
user100 [1]

Answer: Thus the volume of the balloon at that new location is 4.65\times 10^4L

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.995 atm

P_2 = final pressure of gas = 0.720 atm

V_1 = initial volume of gas = 3.93\times 10^4L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 32.0^oC=273+32.0=305.0K

T_2 = final temperature of gas = -11.7^oC=273-11.7=261.3K

Now put all the given values in the above equation, we get:

\frac{0.995\times 3.93\times 10^4}{305.0}=\frac{0.720\times V_2}{261.3}

V_2=4.65\times 10^4L

Thus the volume of the balloon at that new location is 4.65\times 10^4L

4 0
3 years ago
What is the molar concentration of h3o+ in a cola that has a ph of 4.240?
Andreyy89

The pH is calculated using the expression: pH = - log [H3O+].  
 To find the concentration of [H3O+] 
 [H3O+] = 10^(-pH)  
 Solving the RHS we have 10^(-4.240) = 0.1440 
 Hence the concentration of H3O+ is 0.1440.
6 0
3 years ago
50.0 grams of water vapor at STP occupies how much volume?
oksian1 [2.3K]

Answer:

22.4 L

hope it will help you

6 0
3 years ago
A(n) _________is a material that contains only one type of atom.
joja [24]

Answer:

element

Explanation:

Elements are pure substances with only one kind of atom

7 0
4 years ago
What are some examples of physical properties?
den301095 [7]

Answer:

Physical properties: how soft a blanket it, how hard bread is, what color leaves are, what bleach smells like.

Chemical change: burning wood, rotting food, digestion, rusting of a nail.

Physical change: mixing salt and sugar, tearing a piece of paper, melting ice, chopping wood.

Explanation:

Physical properties are properties that are measurable.

Chemical change is when substances combine (fire and wood make burning wood) to make another substance. They aren't reversible. If you were to melt ice, you could refreeze it, you can't unburn wood.

Physical change is something that alters the form of the substance but not the chemical composition.

Hope this helps!

4 0
3 years ago
Read 2 more answers
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