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How can natural selection create two different species from one species?

For speciation to occur, two populations of a species must become reproductively isolated. This can result from either the formation of a geographic barrier between two populations of the species, preventing...
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Answered by Sean K. • Biology tutor
3087 Views

Make y the subject of the formula. x=(6+2y)/(3-y)

To make y the subject of the formula you have to rearrange it so that it starts with 'y=' instead of 'x='. Starting with x = (6+2y)/(3-y), if we get rid of the fraction by multiplying both sides by (3-y), yo...
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Answered by Jema T. • Maths tutor
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The Haber process is used to produce ammonia. (Insert equation here) Explain the optimum conditions for this reaction and why these may differ from the conditions used in industry.

N 2 (g)+3H 2 (g) ⇋ 2NH 3 (g) ΔH=-92kJmol -1 (this is the equation for the above question) According to Le Chatelier's principle, the position of equilibrium will shift to minimise the change made to the cond...
Answered by • Chemistry tutor
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What does the future perfect do?

The main function of the future perfect is in future open conditionals . By a conditional, I mean a clause that includes “if” (Latin si ); a future conditional is simply one that refers to a future event and...
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Answered by George P. • Latin tutor
2910 Views

Explain in terms of particles and collisions how concentration, temperature and addition of a catalyst affect the rate of a reaction.

Concentration: the higher the concentration, the more particles in the same volume. The increase in particle numbers causes an increase in particle collisions, so the rate of reaction increases.Temperature: ...
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Answered by Emily W. • Chemistry tutor
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