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Name and describe the type of bonding in H2O

The bonds in H 2 O are covalent bonds. Covalent bonds are formed when two atoms share a pair of electrons, often where one electron is donated by each atom. This forms a bond as there is an electrostatic att...
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Answered by William S. • Chemistry tutor
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MRSA and C. difficile are resistant bacterial strains which cause life-threatening infections in hospitals. Explain how MRSA/ C. difficile could arise from non-resistant bacteria. [6 marks]

Natural SelectionCompetition for survival between bacterial colonies/ Selection pressure is survivalVariation between colonies linking to phenotype of resistanceSpontaneous mutation produces antibiotic resis...
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Answered by Ijaz C. • Biology tutor
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Calculate (7 + √3)(7 - √3)

(7 + √3)(7 - √3) = 7 2 + 7√3 - 7√3 - (√3) 2 = 49 - 3 = 46Alternatively you can go straight to identifying that this is the difference between two squares, using the fact that (a + b)(a - b) = a 2 - b 2
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Answered by Isabel B. • Maths tutor
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What's the difference between an ionic bond and a covalent bond?

They're both similar but form between different types of elements. An ionic bond will form between a metal and a non-metal. The metal will donate electrons and the non-metal will accept the electrons, formin...
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Answered by George S. • Chemistry tutor
5431 Views

A portable space saving football goal has been launched to promote sport and activities for 3 to 5 year old children. Describe the properties of ABS that make it a suitable material for the football goal.

It is strong and lightweight, and so can be taken apart and stored in a car boot etc. for transport. ABS has a glossy finish which means it requires not protection for indoor or outdoor use. It is a hard pol...
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