Which of the following statements about asteroids is true? a. asteroids vary greatly in size and are mostly made up of frozen water and gas. b. asteroids vary greatly in size and are mostly made up of stone, iron and nickel. c. asteroids are all very large and are mostly made up of stone, iron and nickel. d. asteroids are all very large and are mostly made up of frozen water and gas. reset submit

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

Which sample at stp has the same number of atoms as 18 liters of ne at stp