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What is a mole?

A mole is a unit for amount of substance. This unit was created because we needed a common unit which could be used to convert from eg. number of atoms/molecules to grams or concentration to grams.
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What is the median, upper quartile and lower quatile. How do we find them?

The easiest way to explain this would be to use an examplar question. For example: Ben is given a sequence of numbers and is told to find the median, lower quartile and upper quartile. 1,4,5,6,8,9,11,12,14,1...
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Answered by Daniella B. • Maths tutor
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What is the difference between transcription and translation

Transcription is the sythesis of mRNA, where the DNA code is coverted to a complementary DNA code. Translation occurs where the mRNA is decoded by a ribosome to produce a specific amino acid chain or polypep...
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Answered by Daniella B. • Biology tutor
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What is the fraction of blue beads?

A tin contains red, white and blue beads in the ratio red:white:blue = x:2x:x^2 First we should find the total number of beads in the tin: x + 2x + x^2 = 3x + x^2 The number of blue beads is x^2 So the fract...
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Answered by Rheanne B. • Maths tutor
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How many people chose A?

In a survey people had to choose either A, B, C or D. The percentage of people that chose B, C and D are shown here: B- 25% C- 35% D- 30% You are also told that 150 people chose B. How many chose A? So first...
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Answered by Rheanne B. • Maths tutor
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