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How is pure copper extracted froms it ore?

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Answered by Gatsby F. • Chemistry tutor
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How would you work out the mols of a substance?

Mols is a measure of the amount of a molecule present, chemically defined as 1/12th of an atom of carbon 12 Mols = Mass (g) / Molecular Mass (gmol^-1)
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Answered by Bilal U. • Chemistry tutor
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How should I effectively set out my essay?

An essay should always begin with a clear introduction that addresses the focus and the key terms of the question; and often provides indication of what your conclusion will be. Regardless of your conclusion...
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Describe and explain what is meant by ‘natural selection’. (4 marks)

Natural selection is a theory devised by Charles Dickens. Due to the existent of alleles and genetic variation, some organisms will be better adapted for survival in their given habitat. As a result of this ...
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Answered by Charlotte G. • Biology tutor
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Describe and explain the formation of an oxbow lake. (6 marks)

Oxbow lakes are most commonly found in the middle course of the river, where the river has more energy and higher discharge. A meander is first formed as a result of deposition and erosion - velocity is high...
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