Why is boiling-point elevation a colligative property?
a.
it is inversely proportional to the concentration of particles in a solution.
b.
it is directly proportional to the concentration of particles in a solution.
c.
it does not depend on the concentration of particles.
d.
it is independent of changes in vapor pressure.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa