Hydrogen gas generated by the reaction of zinc and hydrochloric acid is collected via water displacement in an inverted graduated cylinder. THe pressure of the gas collected at 23oC is 99.750 kPa. If the reading from the gas collection cylinder is 0.750 L, how many moles of dry hydrogen were collected? The water vapor pressure at 23oC is 2.809 kPa.

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.

diaria maybe go see a doctor about that