A ball is launched horizontally from a wall of height 1.8 m with an unknown initial velocity. It lands 4.5 meters from the wall. b) how long does it take, in seconds, for the ball to hit the ground?

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?

The number at the end of an isotope’s name is the number.

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds