The equation for the synthesis of ammonia is below. How many moles of H 2 are needed to produce 9.33 moles of NH3? PLEASE HELP I'M STRUGGLING! :(

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium