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Describe and compare three features of the structure and bonding in the three allotropes of carbon: diamond, graphite and C60 fullerene.

I will explain to students that even though they only need to use three features, it is important to learn and understand all five features to excel in the exam. This way, during the exam, the students may p...
AA
Answered by Amit A. • Chemistry tutor
41096 Views

Solve the following simultaneous equations for x and y : 2x - y = 12; x + 3y = 20

When solving equations such as these we have two variables which represent two numbers. In order to solve them we want to isolate and remove one of the variables so we are only left with one, we do this by m...
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Answered by Alexander S. • Maths tutor
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What is the Avogadro constant and what are moles?

The Avogrados constant the number of atoms in a mole. This is 6.02 x10^23. The number of moles are calculated through diving the mass (g) by the relative molecular mass of an element.
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Answered by Devina T. • Chemistry tutor
4892 Views

How do you add fractions? And how do you multiply fractions?

Addition of fractions involve the finding of a common denominator. This would aid the addition. The multiplication of fractions can be made much easier through finding if they can be made smaller through bas...
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Answered by Devina T. • Maths tutor
3902 Views

What is osmosis?

This involves water molecules which are transported from an area of high concentration to a low concentration. This transportation is termed diffusion. This would occur through a partially permeable membrane.
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Answered by Devina T. • Biology tutor
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