One reaction that produces hydrogen gas can be represented by the unbalanced chemical
equation
Mg(s) + HCl(aq) +MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reac-
tion of 3.71 mol of magnesium?
Answer in units of g.

distance, luminosity, brightness, radius, chemical composition, and temperature

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.