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Why does Magnesium Oxide have a higher melting point than Sodium Chloride?

Both Magnesium Oxide and Sodium Chloride exist as a giant ionic lattices where each oppositely charged ion is held in place by a strong electrostatic attractions. These ionic bonds are strong and require a l...
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Answered by James C. • Chemistry tutor
96360 Views

Use examples to explain how sustainable schemes can be used to manage transport in urban areas

Sustainable transport can be defined as transport which meets the need of the present without compromising the needs of future generations. It must be both environmentally and financially sustainable, utilis...
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Answered by James C. • Geography tutor
6760 Views

What properties makes an object stable?

An object will be stable if the centre of mass, the point at which all of the mass of the object is concentrated, is lower to the ground. It will also be stable if there is a wide base. Objects with low cent...
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Answered by Edward A. • Physics tutor
14090 Views

Why does ice float on water?

A substance will float on water if it has a lower density than water. Therefore, ice floats on water simply because it is less dense than water. Water is unlike other substances in terms of changes in densit...
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How can we remember which verbs take Etre in the perfect tense?

An easy way to learn the verbs which take Etre when forming the perfect tense is by using Mrs Van Der Tramp. If you learn every verb on this list, you will know whenever they pop up that you must use Etre. E...
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Answered by Heather P. • French tutor
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