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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
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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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Guard cells open and close stoma in different conditions. When light intensity is high, potassium ions move into guard cells. Describe how this movement of potassium ions causes the stoma to open.

When the potassium ions move into the guard cells they increase the concentration. This causes water to move into the guard cells from more dilute areas by osmosis. The additional water leads to the guard ce...
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Answered by Emily W. • Biology tutor
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