1 Compound X has a molar mass of 283.89 g-mol and the following composition: element phosphorus 0 oxygen mass % 43.64% 56.36% Write the molecular formula of X. X

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Q: о (b) (c) (d) (e) Н3С н... H3C Н CI ОН CH3 -CH3 CI CH3 Н3С̧ CI незав Н CI H3C- CH3

A: A carbon centre which has four different groups or atoms is called as stereocenter.

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Q: (i) H3C CI (ii) НО. ОН

A: l

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.