How many moles of Aluminum are in 54.0 grams of Aluminum (Al)?

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?

How is the way a mixture is combined different from how a compound is combined?

List and describe the neurological effects of the vocs and other air pollutants, as described by dr. theo colborn