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There are two isotopes of element A. Information about the two isotopes is shown in Table 4. Table 4 Mass number of the isotope 6 7 Percentage abundance 92.5 7.5 Use the information in Table 4 to calculate the relative atomic mass of element A. Give your

92.5/100 x 6 = 5.557.5/100 x 7= 0.5255.55 + 0.525 = 6.075= 6.08 (2dp)
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Answered by Natasha C. • Chemistry tutor
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Describe why diamond is hard and graphite is soft?

Diamond and graphite both only have carbons and have covalent bonding involved.Diamond has a giant covalent lattaice and each carbon atom is bonded to 4 other carbon atoms.Graphite on the other hand is forme...
MS
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How do I compare two sources in an exam answer?

It may seem simple, but the first and most important thing to remember when comparing two sources is not to forget to include some kind of analysis on both of the sources in your answer. Just because one may...
EM
Answered by Elizabeth M. • History tutor
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How do vaccinations work?

Vaccinations contain a dead or inactive form of a pathogen, which is a disease causing microorganism (such as bacteria and viruses). When people are vaccinated, the inactivated pathogen goes through the bloo...
TO
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How should I practice for a GCSE French speaking exam?

There are three key stages to revising for a speaking exam. The first, highlighting the different topics up for discussion and what questions might come out of these. Using mind maps, researching the topics ...
BG
Answered by Billi G. • French tutor
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