This question is on lithium carbonate. I have attached a picture of the question bellow. Please answer ASAP

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

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?