Which weighs more? a. they both weight exactly the same. b. four protons c. two neutrons and two protons in a helium nucleus?

Why is an elements atomic mass not listed as a whole number on the periodic table

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?