Germaine wants to know exactly how acidic lemon juice is. which of these can tell him the ph most precisely? a. ph probe b. indicator solution c. red cabbage juice d. ph paper

pH probe

Explanation:

A pH probe is the most accurate and consistent way of measuring pH. While pH paper and an indicator solution is viable, the most precise way would be to use a pH probe or meter

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.

it's c (engineer's do their work with mechanical stuff not on any living being)