Calculate the number of moles and the number of grams of solute in each solution. 1.0 L of 0.50 M NaCl

500 mL of 2.0 M KNO3

250 mL of 0.10 M CaCl2

2.0 L of 0.30 M Na2SO4

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

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.

Achemist reacted 57.50 grams of sodium metal with an excess amount of chlorine gas. the chemical reaction that occurred is shown. na + cl2 → nacl if the percentage yield of the reaction is 86%, what is the actual yield? show your work, including the use of stoichiometric calculations and conversion factors.