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The diaphragm is a large muscle located at the base of the lungs. It is naturally dome shaped when relaxed. 

When we need to inhale, the diaphragm will contract and flatten out. This increases the ...

Benzene to nitrobenzene / nitration of benzene. Conditions: concentrated nitric acid and concentrated sulfuric acid. Carried below 50^oC to avoid further substitution of nitro groups

Nitr...

A common question asked by a lot of students at all levels!

You must remember to always refer back to the mark scheme for the exam that you will be taking. When looking at past pap...

When rationalising, multiply the fraction by the denominator - so what that means is multiply the fraction by the square rooted number over the square rooted number. The numerators then multiply to give 6...

Both the “Plusquamperfekt” and the “Perfekt” are past tense, each of them describing a different level of the past – highlighting the relationship between several actions in the past.
The “Perfekt” ...