Calculate the volume of 30.1 moles of ammonia. If we have 0.072 g of FeCl3 then how many moles are there?

How many molecules are in 3.78 x 10-3 moles of water?

How many molecules of hemoglobin are there in 8.4 x 10-3 g? The molar mass of hemoglobin is approximately 68,000 g/mole.

Compare and contrast the bohr model and the electron cloud models of the atom.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.