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To obtain a top mark in an essay for A-level Biology it is vital that you mention areas covered under all the modules of the course- the questions that are asked are usually very broad and your answer sho...

So relative formula mass (M_r) just means the total mass of all the atoms within our molecule. So lets work out how many of each atom we have: Ba - 1, C - 1, O - 3Now we know the relative atomi...

Energy that cannot do work, often compared to the disorder of a system. Total entropy can never decrease.

i) N₂ (g) + 2H₂ (g) = 2NH_3ii) Le Chatelier’s Principle : If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium m...

Compound E is an unbranched alkane. The general formula of an alkane is C_nH_2n+2.Compound E is CH₃CH₂CH₂CH₂CH₂CH₃.Com...