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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)
NC
Answered by Natasha C. • Chemistry tutor
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Describe the Ethnic Density Effect relating to Psychosis. What did Velling et al (2007) find relating to this, and what does it suggest about the role of socio-developmental factors in psychosis?

Ethnic minorities living within an area with few people from the same ethnic background is associated with increased psychosis incidence.Within Velling et al's (2007) study they found that immigrant groups i...
MV
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What sort of stuff should I write about in my personal statement regarding work experience?

This is an area where a lot of people mess up. They have vast amounts of experience shadowing healthcare professionals and they want to write it all down and what they end up doing is listing off all the exa...
SK
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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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If a ball is dropped from 6m above the ground, how long does it take to hit the floor and what is its speed at impact (assuming air resistance is negligible)?

Distance, s = 6m ; initial speed, u = 0 m/s ; final speed, v = v m/s ; acceleration, a = 9.8 m/s (g) ; time, t = t sTime:s = ut + 0.5at 2 , 6 = 0 + (0.5 x 9.8)t 2 , 6 = 4.9t 2 , 1.8367 = t 2 , t = 1.355 s Sp...
RR
Answered by Rebecca R. • Maths tutor
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