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What happens to the reactivity going down group 7?

The reactivity decreases down group 7 as the atomic radius increases, as the distance between the outer shell electrons and nucleus increases. As a result less energy is required to remove the outer electron.
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Answered by Sarish S. • Chemistry tutor
3206 Views

Give the molecular formula of benzene. Give the Kekule structure of benzene and then explain why this structure is not correct. Give the accepted structure for benzene (5 marks).

Molecular formula: C 6 H 6 The Kekule structure (draw on whiteboard in session) - has the hexagonal shape of the ring, with a carbon=carbon double bond on every other carbon-carbon link. This has been proven...
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Answered by Ben S. • Chemistry tutor
3089 Views

Write 36 as a product of its prime factors

3 2 x 2 2 Drawing a tree during explanation is very helpful.
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Answered by Nighat K. • Maths tutor
4066 Views

Putting bee honey on a cut kills bacteria. Honey contains a high concentration of sugar. Use your knowledge of water potential to suggest how putting honey on a cut kills bacteria.

Sugar is a solute, so honey contains a high concentration of solutes. This increases the solute potential, and decreases the water potential of honey, which is therefore lower than the water potential in bac...
NK
Answered by Nighat K. • Biology tutor
3879 Views

3/5 of a number is 162. Calculate the number.

Non calculator paper. 162 divided by 3 = 1/554 = 1/554*5 = 270
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Answered by Nighat K. • Maths tutor
6460 Views