All participants in the Genius dog challenge are border collies which some experts think are the what breed of dog?
1 answer:
As far as the intelligence of canines, it is widely accepted as a fact that the Border Collie is the most intelligent breed of dog.
The conclusion that border collies are the most intelligent breed of dog is credited to a canine psychologist by the name of Stanley Coren. He studied over 138 recognized breeds of dogs to measure the ease with which they learned new commands and the obedience rate of each breed.
Coren studies the learning and obedience of Border Collies over the course of 199 trials and found that this breed of dog <u>performed </u><u>95%</u><u> better than most other breeds, with only 9 of the 138 </u><u>breeds </u><u>studied coming close to the results of the </u><u>border</u><u> </u><u>collie</u>. Easily earning the title of the most intelligent breed of dogs.
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Answer:
The final product of the reaction is (<em>2S,3S</em>)-2-ethoxy-3-methylpentane.
Explanation:
The given reaction undergoes mechanism in which the nucleophile attacks the backside and it is substituted by the elimination of bromine.
Due to the backside attack of nucleophile , the inverse in stereo-chemistry is observed.
After the substitution of ethoxy group, the configuration is assigned according to the priority it shows clock wise direction(R) - configuration.
When hydrogen faces the front side , it results shows inverse configuration i.e, S- configuration.
The chemical reaction is as follows.
Answer:
The correct answer is option c.
Explanation:
Alkanes with higher molecular mass has higher boiling point.
Thisis because when the molar mass of the alkanes increases the the surface area increases with which van der Waals forces between the molecules of alkane also increase which increases the association of the molecules of with each other which results in increase in boiling point is observed.
The increasing order of the molar mass of the given alkanes;
So out of ethane, pentane and heptane . Heptane has highest molecular mass with higher boiling point value. Where as ethane have the lowest value of boiling point.