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CO(g) + 2H2(g) ⇌ CH3OH(g). A pressure of 100 atmospheres is used instead of atmospheric pressure. The higher pressure gives a greater yield of methanol and an increased rate of reaction. Explain why.

4 marksExplanation: Increasing the pressure (gases) of reactions increases the frequency of collisions, therefore increasing the rate of reaction .If the pressure is increased in a reaction involving gases, ...
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Answered by George O. • Chemistry tutor
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l1 and l2 are tangents of a circle. l1 intersects the circle at (3-√3,5) with a gradient of √3, and l2 intersects the circle at (3+√2,4+√2) with a gradient of -1. Find the centre of the circle, and hence find the radius of the circle.

To first find the centre of the circle, the key fact to remember is that the radius of a circle is normal (perpendicular) to any tangent. This means if you take the normals to both of these tangents at their...
JB
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What are the six modal verbs in German?

The six modal verbs are müssen (to have to), können (to be able to), wollen (to want (to)), sollen (to be supposed to), dürfen (to be allowed to), and mögen (to like).They behave differently to other verbs i...
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Answered by Holly R. • German tutor
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Explain how the hormone insulin controls blood glucose concentration

Insulin is a hormone secreted from the pancreas in response to high blood sugar levels (glucose). Insulin causes cells in the liver to convert glucose into glycogen (storage molecule) absorbing glucose out o...
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Answered by Shivam K. • Biology tutor
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What happens to the arteries in coronary heart disease?

The blood vessels supplying the heart (coronary arteries) become narrowed or blocked. This is caused by plaque buildup in the artery walls. These plaques are made up of fatty deposits (cholesterol). Plaque b...
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Answered by Shivam K. • Biology tutor
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