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A sample of pure gold has a density of 19300 kgm^-3. If the density of a gold nucleus is 1.47x10^17Kgm^-3, discuss what this implies about the structure of the gold atom. [4 marks]

To gain all of the marks, 4 different points must be made. To begin, state what is obvious: The density of the gold nucleus is much greater than the density of the gold atom. The next step is to discuss what...
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Answered by Rebecca L. • Physics tutor
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How do I use "Essere" and "Avere" in the perfect tense?

First of all, in Italian the perfect tense has a precise structure: -The auxiliary verb, essere or avere, in his present form (Io ho, tu sei, egli ha) -The past participle, such as "mangiato" or &q...
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Answered by Filippo P. • Italian tutor
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How do I structure an essay?

One useful way of structuring an essay is to divide it into sections as follows: Introduction: This should use words from the question and briefly summarise what you will argue/examine/discuss throughout the...
ME
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How do I structure a good personal statement?

The opening of your statement should be a short sentence regarding your area of study. You should briefly explain what elemnts fascinate you within this subject and highlight some of your qualities. Remeber ...
ME
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How do you answer a long answer question on how buffer systems work?

1) First, state how the buffer is prepared by saying that an excess of acid reacts with a base (include the equation for this reaction) b) Write the overall equation of the buffer system (remember to show it...
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Answered by Ritvij S. • Chemistry tutor
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