A1.5 v battery moves 9000 c of charge around a circuit. part a by how much does the chemical energy of the battery decrease

In moving a charge through potential difference, work done can be calculated as follows:

Here, q is charge and V is potential difference.

(a) According to law of conservation of energy, chemical energy of the battery will be equal to work done, thus,

Putting the values,

Since, 1J=CV

Thus, the amount of chemical energy decreases will be 13500 J.

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2

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.