Which substance cannot be broken down by a chemical change?
1) ammonia
2) ethanol
3) propanol
4) zirconium

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?

What happens to isotopes that are unstable?

The same side of the moon always faces earth because the