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Coal is a fossil fuel and in constant debates for its negative impacts on the environment. Which elements does it consist of and which products are being formed when it is burned? Give two examples for the effects on the environment.

(a) Coal contains Carbon (80%) Sulfur (9%) Oxygen (5%) Hydrogen (1%) other elements (5%) (b) Carbondioxide (CO2) Sulfurdioxide (SO2) Water (H2O) (c) Carbon dioxide: Global warming (green house effect) Sulfur...
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Answered by Thea P. • Chemistry tutor
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Bill's Diner is an American burger restaurant. There is an increase in import costs of products needed from America, and change in perceptions of fast food such as burgers, due to an increase in health warnings. Discuss the effects on the market. (6)

A decrease in supply (1) A decrease in demand (1) A reduction in overall market quantity (1) An indeterminable effect on price (1) Effect will depend upon relative size of the shifts (1) and the price elasti...
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Answered by Daanial C. • Economics tutor
2199 Views

How can I describe a sentence?

Declaritive - to declare something Imperative - to demand Interrogative - to question, indicated via a question mark '?' Exclamative - to exclaim, indicated via an exclaimation mark '!' Rhetorical question -...
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Answered by Kelly C. • English tutor
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Why is a percentage yield never 100%?

There are a few reasons why percentage yield will never be 100%. This could be because other, unexpected reactions occur which don't produce the desired product, not all of the reactants are used in the reac...
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Answered by Alex B. • Chemistry tutor
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Psychologists have claimed that some studies of eyewitness accounts lack ecological validity. Explain why these studies might lack ecological validity. (3 marks)

Eyewitness accounts lack ecological validity as they do not take in the real world, like they would in an actual crime scene. They may take place in a laboratory setting. Therefore, their findings cannot be ...
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Answered by Emma D. • Psychology tutor
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