An atom of 28Na has a mass of 27.97878 amu. Calculate the binding energy in MeV per atom. Use the masses: mass of 1H atom

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate