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How can one differentiate between the organic compounds propanal (CH3CH2CHO) and propanone (CH3COCH3)?

React a sample of each compound with Tollens reagent. The aldehyde (propanal) will be oxidised to a carboxylic acid (propanooic acid) and will form a silver mirror. No change will be observed with the ketone...
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Answered by Julie T. • Chemistry tutor
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What are the necessary conditions for a random variable to have a binomial distribution?

There can only be two possible outcomes, 'success' and 'fail' (e.g heads or tails) There is a fixed number of trialsThe probabilities of 'success' and 'fail' are constant and stay the same in each trial (e.g...
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Answered by Julie T. • Maths tutor
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How can I write a Personal Statement fit for Oxbridge?

Writing a Personal Statement when applying to Oxford or Cambridge is a different process to any other Personal Statement, particularly for an Arts degree. I teach my students the process of writing the perso...
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Solve the quadratic equation x^2 + x - 6 = 0

There are 3 methods for solving quadratic equations;FactorisingThe quadratic equationCompleting the SquareUsing method 1,We observe that 2 and 3 are factors of 6 and that 3 - 2 = 1 so by factoring out we hav...
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Answered by Thomas A. • Maths tutor
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Describe three roles of membranes within cells.

Compartmentalisation - as different organelle's different metabolic reaction require different optimum environments such as pH and temperature. Site of chemical reactions such as photosynthesis or respiratio...
Answered by • Biology tutor
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