Twenty-seven milliliters of an acid with an unknown concentration are titrated with a base that has a concentration of 0.55 m. the indicator changed color when 12.5 milliliters of base were added. what is the concentration of the unknown acid? 0.25 m 1.2 m

Twenty-seven milliliters of an acid with an unknown concentration are titrated with a base that has a concentration of 0.55 M. The indicator changed color when 12.5 milliliters of base were added. The concentration of the unknown acid is 0.25 M.

the answer is   c.) 1575 j.

explanation:

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.