A 20.0 mol sample of C3H8 (g) and a 90.0 mol sample of Cl2(g) are placed in a previously evacuated vessel where they react according to the equation above. After one of the reactants has been totally consumed, how many moles of HCl(g) have been produced?

An occluded front moves over the farmland that has been experiencing drought conditions. what change in weather will this front likely bring? a. gray skies, but no rain b. an extended period of rain c. more dry air and sunny skies d. violent, short-lived thunderstorms

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?