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Explanation of keys words first; a gene is a section of DNA that codes for a particular characteristic such as eye colour. An allele is a version of a gene (e.g. an allele for the eye colour gene could co...

Demand characteristics are the clues in an experiment which could convey the purpose of the research to the participant. Participants will be affected by: (i) their surrounding: (ii) the researchers chara...

Avogrado's constant = 6.02214086 × 10²³ mol^{-1 2.5/6.02=0.415 Ar of N = 14 Mr of N2 = 28 28 x 0.415=11.62}