On a rollercoaster ride, when do the cars have the most kinetic energy?

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?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work