7. A cylinder with a volume of 2.48 L of O, at a pressure of 500.0 kPa and a temperature of 26 °C. Under these conditions, the cylinder contains 16 g of the
above mentioned gas. What mass of nitrogen gas would the cylinder contain
under the same conditions?

put the answers   and i could 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.