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What is osmosis? A diagram may be useful for your explanation

Osmosis is the passive movement of water across a semi permeable membrane from an area of high concentration to an area of low concentration.
OA
Answered by Omar A. • Biology tutor
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Explain how CH3CH2CHO can react with a Grignard reagent to produce CH3CH2CH(OH)CH2CH3. State the reagents and give the mechanism.

Use the Grignard reagent CH 3 CH 2 MgBr. CH 3 CH 2 CHO + CH 3 CH 2 MgBr ---> CH 3 CH 2 CH(OH)CH 2 CH 3 step one: add Grignard reagent.step two: work up with H + /H 2 0.Mechanism on whiteboard.
JC
Answered by Jenny C. • Chemistry tutor
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Show x^2 + 8x +15 = 0 in the form of (x+b)^2 +c (complete the square) and then solve the equation

x 2 +8x +15 = 0 (x+4) 2 -16 +15=0 (x+4) 2 -1=0 (x+4)= (+/-)1 x = -3 or -5
OA
Answered by Omar A. • Maths tutor
4214 Views

How do lines 4–9 (verum Acerronia ... infertur) give a strong impression of Agrippina's quick thinking and intelligence?

During the shipwreck, Tacitus throws emphasis on Agrippina’s quick thinking and intelligence by juxtaposing the character with her companion, Acerronia. While Acerronia is defined by the qualifying “impruden...
RM
Answered by Rory M. • Latin tutor
2736 Views

Explain why a mutation in the viral RNA leads to a change in the 3D shape of the protein antigens (3 marks)

A mutation in the viral RNA results in a change in the RNA base sequences. This can result in a change in the amino acid sequence during translation. This then changes the position of intramolecular bonds, s...
VK
Answered by Virad K. • Biology tutor
13167 Views