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During fractional distillation, what are we seperating and how are we seperating them?

During fractional distillation, the process of heating a mixture is used to seperate fractions. Each fraction has a different boiling point. As we begin to heat the mixture, the substances that have a lower ...
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Answered by William T. • Chemistry tutor
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What are the changes in energy that an object experiences when it is launched vertically at a given velocity into the air and falls back to the ground? This question ignores air resistance.

When the object is launched into the air it has a kinetic energy proportional to its velocity squared. As it travels its energy is converted into gravitational potential energy as it slows down due to the ef...
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Answered by Andrew H. • Physics tutor
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Explain why the structure of benzene cannot be acurately described using Kekule's structure (cyclohexa-1,3,5-triene).

During analysis of benzene we see that the bond lengths and angles are all the same. In the theoretical molecule however, due to the differing lengths of bonds between double and single bonds, the bond lengt...
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Answered by William T. • Chemistry tutor
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Write the equation for photosynthesis

6H 2 O + 6CO 2 --> C 6 H 12 O 6 + 6O 2
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Answered by Nathan S. • Biology tutor
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Given g(x) = 4* sin (3*x), find the value of g'(pi/3).

Using the table of standard derivatives given at the beginning of the Higher Paper we have, for f(x) = sin(a x), f'(x) = a * cos (a x)and so with this we have, g(x) = 4 * sin(3 x), g'(x) = 4 * 3 * cos(3 x) =...
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Answered by Romy M. • Maths tutor
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