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Describe the effect in terms of particles and collisions the effect of increasing temperature on rate of reaction?

The rate of reaction will increase. Increased temperature causes the particles to move faster, increasing the number of collisions between the particles. More particles have energy exceeding the activation e...
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Answered by Luke R. • Chemistry tutor
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A circular table top has diameter 140 cm. Calculate the area of the table top in cm² , giving your answer as a multiple of π.

Area of a circle = π r² r = (1/2) d = (1/2) * 140 = 70 area = π * (70)² = 4900 π cm²
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Answered by Sulem M. • Maths tutor
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How do I effectively close-read a passage from a novel studied in the exam? - GCSE English Literature

Student should read the passage once over to try and place it within the context of the novel. Highlight key terms in the question, e.g. a question asking how Steinbeck presents the relationship between Geor...
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What is radioactivity?

Imagine a water ballon which is slowly filling up with water. The ballon is fine and intact when there's not much water in it but what happens when we fill it so much that it can no long hold all the water? ...
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Answered by Eoin B. • Physics tutor
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Explain how CO2 can cross a cells plasma membrane

Normally we think of CO2 as a gas because it is (at least when its in the atmosphere it is). However, it is a very different story inside of cells. CO2 is produced as a result of respiration inside mitochond...
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Answered by Eoin B. • Biology tutor
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