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What is a mole?

A mole is the amount of a substance which contains as many particles (atoms, ions, molecules etc) of the substance as there are carbon atoms in 12g of 12 C - this is exactly 6.02 × 10 23 atoms. This formula ...
MN
Answered by Molly N. • Chemistry tutor
3108 Views

What are the differences between sigma and pi bonds?

A sigma bond can be between s or p orbitals whereas a pi bond can only be between p orbtials In signma bonds, atomic orbitals overlap along bonding axis, in pi bonds atomic orbitals overlap above and below b...
PK
Answered by Philip K. • Chemistry tutor
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Explain the structure and characteristics of benzene

Initally, benzene was thought to have the kekule structure. This was thought to be an interconversion of two different discrete strucutres of a 6 carbon ring with single and double bonds. However there were ...
DP
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Alcohol A has the chemical formula CH3CH(OH)CH2CH(CH3)CH3 . Give the IUPAC name for alcohol A.

Firstly I would get the student to draw out the structure of the alcohol and check whether they were able to place the alcohol groups and side chains in the right place on the chain. Then I take would them t...
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Answered by Emma B. • Chemistry tutor
19141 Views

A naturally occurring sample of the element boron has a relative atomic mass of 10.8 In this sample, boron exists as two isotopes. Calculate the percentage abundance of 10B in this naturally occurring sample of boron.

The answer is 20%. This is a failry common question and stomps many students. The easiest way to answer this question, in my opinion, is to see that this question is asking you to figure out the ratio of iso...
TA
Answered by Tony A. • Chemistry tutor
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