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What is the difference between a heterogeneous catalyst and a homogeneous catalyst?

Homogeneous catalyst - catalyst is in the same phase as the reactants. Heterogeneous catalyst - catalyst is in a different phase as the reactants. What ...

KW
Answered by Katie W. Chemistry tutor
7030 Views

3 teas and 2 coffees have a total cost of £7.80 5 teas and 4 coffees have a total cost of £14.20 Work out the cost of one tea and the cost of one coffee.

You make simultaneous equations. 1.) 3T+2C=7.82.) 5T+4C=14.2Then you make either the C or the T coefficient equal in both equations. I choose to make the C coefficients the same. So I multiplied equation ...

DS
Answered by Dan S. Maths tutor
5996 Views

What is the difference between the use of l'imparfait and le passé composé

Le passé composé is one of the past tenses. It is formed by using an auxiliary/first verb (either être or avoir) in the present tense and following it with the past participle of the desired verb. L’impar...

RW
Answered by Rosalind W. French tutor
2361 Views

Differentiate (x^2)cos(3x) with respect to x

First we start off by seeing that we are multiplying together two functions both containing x, so we want to apply the product rule. As we know the product rule is (f(x)g(x))'=f(x)g'(x)+f'(x)g(x) so we ca...

AB
Answered by Arthur B. Maths tutor
8741 Views

Compare the advantages and disadvantages of using bioethanol over fossil fuels.

Bioethanol is a renewable fuel produced from plants, which photosynthesise to grow, taking in carbon dioxide and producing oxygen. This means there is no net increase in carbon dioxide, which is a greenho...

MI
Answered by Michael I. Chemistry tutor
4631 Views

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