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Carbon dioxide is a gas at room temperature while silicon dioxide is a solid at room temperature with a melting point of 1770°C. Explain this by comparing their particles and those forces between these particles.

Although C and Si are both group 4 elements, C is much smaller than Si and can form double bonds with two oxygen atoms whereas Si is larger and so forms single bonds with four oxygen atoms. This means th...

Answered by • Chemistry tutor

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‘A noble Venetian lady is to be murdered by our poet in sober sadness, purely for being a fool!’ In light of this view, discuss Shakespeare’s representation of Desdemona in 'Othello' and whether it challenges the morals of his time.

The worth of women in the Jacobean era relied predominantly on their obedience to men; particularly to fathers for use as a marital match. Seen as fools, a submissive and meek demeanour was expected of th...

Answered by Emily R. • English Literature tutor

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What is Osmosis?

Osmosis is the diffusion of water molecules across a partially permeable membrane, from an area of high water concentration to an area of low water concentration. For exam if you're on the tube you will g...

Answered by Nasirdeen Y. • Biology tutor

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What medical speciality or field currently interests you, and what have you done so far to get experience in the field?

There is no right answer to this question. However the candidate should demonstrate some forward progress in regards to their perceived dedication to Medicine as a career. Experience does not have to be h...

Answered by • Medical School Preparation tutor

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(b) In healthy lungs, a gradient is maintained between the concentration of oxygen in the alveoli and the concentration of oxygen in the lung capillaries. (i) Describe how ventilation helps to maintain this difference in oxygen concentration.

Ventilation of the lungs is a mechanism designed to maintain a high concentration of oxygen present in the alveoli. Blood is delivered to the lungs from the heart deoxygenated, meaning the majority of hae...

Answered by • Biology tutor

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