Is it possible for the properties of a substance with a specific type of bond to vary

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

0.09 moles of sodium sulfate in 12 ml of solution