The first peak on the chromatogram (identified as n-propyl benzene) was observed at a distance of 5.11 cm from the injection point marked on the chart and the second peak (identified as isopropyl benzene) was observed at a distance of 7.88 cm from the injection point. What was the retention time for n-propyl benzene (in seconds)

c. 75.7

i think that is the right

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

it takes on an electronical energy

the answer is c

tell me if wrong