The reaction of 4.8 g sulfur and 5.4 g aluminum yields 4.5 g
Al2S3 in the reaction below:
35 + 2A1 - Al2S3
Determine the percent yield of Al2S3. (Molar mass of S = 32
g/mol, molar mass of Al = 27 g/mol)
Enter the answer

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.