Chemistry! !

i'm suppose to convert the given information: gps speed of 40.1 miles per hour and convert that to meters, or convert 32.03 meters to miles.

i really do not understand how to do this, but if someone could show me where to start and teach me what to do i'd appreciate it. i'm just stuck : (

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?