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How do I multiply two brackets without missing terms when multiplying?

In order to answer these sorts of questions where you have double brackets and need to expand them it is useful to use the FOIL (First Outer Inner Last) method. By using this systematic method it ensures ...

Answered by Andrew R. • Maths tutor

6038 Views

Explain why the product of nucleophilic addition of a cyanide ion to the ketone CH3COCH2CH3 shows no optical activity

The ketone group is planar and the cyanide ion has equal chance of attacking above or below the plane. Therefore a racemic mixture of the product is formed and the product shows no optical activity

Answered by Hannah T. • Chemistry tutor

2334 Views

Jodie buys 12 cans of cola. There are 330 ml of cola in each can. Rob buys 4 bottles of cola. There is 1 litre of cola in each bottle. Rob buys more cola than Jodie. How much more?

Again, I would highlight the important points of the question.

Jodie buys 12 cans which are 330ml in each can.
Rob buys 4 bottles which are 1 litre each.

...

Answered by Nurul Sofia Hannah M. • Maths tutor

10227 Views

Amber earns £7 for each hour she works from Monday to Friday. She earns £10 for each hour she works on Saturday. One week Amber worked for 4 hours on Saturday. That week she earned a total of £180. How many hours did Amber work that week?

So to break this question down, I would highlight the key points of the question.

She earns £7 per hour on Monday to Friday.

She earns £10 per hour on Saturday

NS
Answered by Nurul Sofia Hannah M. • Maths tutor
6194 Views

DNA contains the information that an organism needs to survive. How is this information read and transformed into funcional products?

Inside a cell of a living organism, the information stored in the DNA in the form of genes is first read and translated into an intermediate molecule, RNA, inside of the nucleus. This molecule of RNA, whi...

Answered by Alba R. • Biology tutor

2372 Views