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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...
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.
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 a...
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
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%
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