A gas has a pressure of 300 torr, a temperature of 400 K, and a volume of 50.0 milliliters. What volume will the gas have at a pressure of 150 torr and a temperature of 200 K?

P1 = 300 torr

V1 = 50 mL

P2 = 150 torr

V2 = ?

applying Boyle's Law

P1 * V1 = P2 * V2

300 torr * 50 mL = 150 torr * V2

V2 = 300 torr * 50 mL / 150 torr

V2 = 100 mL

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.