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How will a catalyst affect the position of equilibrium?

A catalyst is something that speeds up the rate of reaction, without being consumed during the reaction. If a catalyst is used in a reaction, it will only speed up the forward and backward reaction, however ...
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Answered by Zareen K. • Chemistry tutor
11018 Views

‘Appetite – whether for power, knowledge or sex – is always a destructive force.’ In the light of this view, discuss ways in which writers present appetite. In your answer, compare one drama text and one poetry text.

Both Christina Rossetti and John Webster explore how an unconstrained appetite results in suffering. Webster’s Ferdinand desires power over his sister’s sexuality, knowledge of her intimacies (he instructs B...
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Answered by Jasmine C. • English tutor
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Given that y = (sin(6x))(sec(2x) ), find dy/dx

We can find dy/dx by using the product rule: If y=uv then dy/dx = u (dv/dx)+ v (du/dx). In this question u= sin(6x) and v= sec(2x).So du/dx= 6cos(6x) and dv/dx=2sec(2x)tan(2x), using our rules for differenti...
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Answered by Eli H. • Maths tutor
4325 Views

Measles, mumps and rubella (MMR) are dangerous diseases that can be fatal to children. The MMR vaccine is given to children at a young age to produce antibodies against these diseases. Describe how giving the vaccine leads to the production of antibodies.

The vaccine contains weakened or dead antigens (from MMR). These antigens are displayed on antigen-presenting cells which are detected by a specific helper T cell. This stimulates a specific B cell which div...
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Answered by Gracie B. • Biology tutor
2569 Views

What is transpiration and what factors affect its rate of occurrence? Describe some adaptations of xerophytic plant that reduce water loss via transpiration.

Transpiration is the evaporation of water through open stomata, occurring down the water potential gradient.Factors affecting the rate of transpiration:Light intensity - more stomata will be open to take in ...
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Answered by Jessica T. • Biology tutor
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