There is no question on here lol
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Answer:</h3>
The structure of Electrophile (2-methylpropan-2-ylium) is shown in attached picture highlighted by green color.
<h3>Explanation:</h3>
Electrophiles are those species which are electron deficient and loves electron. These species often carry positive charge or contain atoms which have incomplete octet.
Also, we know that Benzene undergo Electrophilic Substitution reactions in which hydrogen atom is replaced by other electrophile. In given statement the electrophile to be reacted with benzene to form tert-Butylbenzene is generated from 2-methylpropene. 2-methylpropene when treated with phosphoric acid adds one proton across the double bond (electrophilic addition reaction) and generate a positively charged tertiary carbocation (stable) (highlighted green) which acts as an electrophile. Further on reaction with benzene this electrophile is substituted with proton and results in the formation of tert-Butylbenzene.
The most important variable to control in this experiment the type of bicycle tyre.
<h3>What is an experiment?</h3>
An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.
According to this question, Dan and Dawn wants to know if there is any difference between the mileage expected from bicycle tires from two different manufacturers.
Dan, then, conduct an experiment by putting one brand on his bike and Dawn will put the other brand on her bike.
In this experiment, the independent variable is the different mileage from different manufacturers. This means that to make this experiment a controlled one, all other variables must be kept constant.
Therefore, the most important variable to control in this experiment the type of bicycle tyre because Dan and Dawn must ensure that they use the same type of bicycle tyre.
Learn more about experiments at: brainly.com/question/11256472
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Answer:
B. is coupled to the production of ATP
Explanation:
The magnesium in chlorophyll acts as an activator of enzymes associated with energy metabolism, especially respiratory enzymes and others that act on phosphorylated substrates such as ATP.