grammar Usage of than that and than those English
I wish to to know the correct usage of than in the following sentences 1 The melting temperature of solvent A is comparatively lower than those than that of other binary solvents involving B and C manufactured by the firm 2 Usain Bolt ran his 100 m final race at London 2012 faster than in 100 m race at Rio 2016 How to modify 2 such that the second 100 m race does not appear