Four skydivers jumped out of the same plane at the same time. Two have opened their parachutes, and two have not. Which skydiver has the most gravitational potential energy?

How many moles are in 123.0 grams of kclo4?

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon