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Which of the following shows the formation of the intermediate in the mechanism for the reaction between ethene and bromine?

Answer C
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Answered by Ndidi I. • Chemistry tutor
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Trend in Melting point going down group 1 elements

Going down group 1 the period number increases. This means the number of shells increases, leading to a decrease in electrostatic attraction between the positive nucleus and outer most electrons. This weaker...
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Answered by Amin U. • Chemistry tutor
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Describe how crude oil is separated by fractional distillation.

Crude oil is composed of hydrocarbons of different lengths. In a fractional distillation chamber, the crude oil is heated and cooled to different temperatures. The shorter chain hydrocarbons will boil at a l...
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Answered by Sophie P. • Chemistry tutor
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Discuss the reactivity benzene, chlorobenzene, toluene and phenol in electrophillic aromatic substitution

Phenol > Toluene > Benzene > Chlorobenzene. The reactivity of the ring is dependant on how electron rich it is, as this determines the extent to which the (positively charged) electrophile can attac...
JM
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Explain whether phosphine or ammonia has a higher boiling point

Background knowledge Boiling point reflects the strength of intermolecular forces. The more attracted molecules are to each other, the more energy is needed to separate them and turn them into gases. Three m...
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Answered by Jadwiga P. • Chemistry tutor
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