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What is the optical activity of the product formed when propanone is refluxed with HCN with KCN dissolved in ethanol and why?

The product formed (hydroxybutanitrile) is optically inactive because the nitrile nucleophile can attack the propane at its carbonyl bond which is trigonal planar about it. There is an equal chance of it ...

AY
Answered by Aditya Y. Chemistry tutor
2119 Views

A plant is moving mineral ions from the soil into its roots by the process of active transport. Does this suggest that the concentration of ions is higher in the soil or the roots?

The concentration is higher in the soil. The process of active transport is used to move molecules against the concentration gradient (from a low to a high concentration). Therefore the concentration of i...

AM
Answered by Alice M. Biology tutor
9365 Views

Explain the Polymerase Chain Reaction (PCR) as a technique to make copies of DNA.

PCR takes place in three stages - denaturation, annealing, and extension. The process begins with a very small quantity of DNA being loaded into a PCR machine. The hydrogen bonds that exist between the tw...

AB
Answered by Aashna B. Biology tutor
3250 Views

Prove algebraically that n^3+3n^2+2n+1 is odd for all integers n

To show this we should consider when n is odd and when n is even,If n is odd then we can find an m such that n=2m+1. Substituting n=2m+1 and expanding gives 8m^3+12m^2+6m+1+12m^2+12m+3+4m+2+1=8m^3+24m^2+2...

AP
Answered by Alistair P. Maths tutor
4407 Views

If a star with a radius of 600000km has a surface temperature of 6000K, calculate its luminosity

Use the formula Luminosity = (Surface temperature)^4Surface area Stefan's constantCalculate surface area with 4piradius^2Area=4.5210^18therefore luminosity= 4.5210^18 * (6000)^4...

Answered by Physics tutor
1683 Views

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