Si se agragan 75g de sustancia y en 100g de agua a 80c de acuerdo con la grafica se puede decir que a) 15g de sustancia y permanecen sin disolver B)la sustancia y se disuelve totalmente C)la sustancia y permanece sin disolver D) la sustancia y inicialmente se disuelven y despues precipita en su totalidad

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c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.