James Chadwick, like Ernest Rutherford, had to infer that neutrons were present in atoms. He made inferences based on observations of the behavior of atoms during
experimental tests. Using evidence from Rutherford's gold foil experiment, defend the
following claim: Scientific knowledge is based on observation and inference.

the answer is 75.0%.

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.

c. electrical charges of ionic bonds.