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Name and explain the process in which crude oil is separated into fractions. (5 marks)

The process is fractional distillation : the separation of a mixture using heat. The crude oil is heated and the mixture will evaporate . The mixture will then rise up the column and cool as it rises as the ...
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Answered by Emily P. • Chemistry tutor
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A group of 44 pupils were asked if they owned a phone or a tablet. 5 people are known to own both 3 said they only owned a tablet 17 said they owned at least a phone A student is picked a random, what is the probability that the student doesn’t have

So in this question, there are 4 main people in this question; those who own ONLY a phone, ONLY a tablet, both a phone or a tablet or NONE. How do you think we could represent this information? Prompt studen...
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Answered by Niki C. • Maths tutor
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b)Plants can use the glucose they have made to supply them with energy. Give four other ways in which plants use the glucose they have made.

To make starch, oil, amino acids and cellulose.
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Answered by Emma S. • Biology tutor
10778 Views

a) Plants need energy to make glucose. How do plants get this energy?

Light is trapped, by the chloroplasts.
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Answered by Emma S. • Biology tutor
8420 Views

Show me why the product of a squared and a cubed is a to the power of 5.

When we find the product of two terms that has the same base (in this case, a), we can simply add the powers. This can be explained using knowledge of squares and cubed. a 2 = a x a and a 3 = a x a x a and s...
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Answered by Leon M. • Maths tutor
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