A container is filled with 10.0g of H2 and 5.0g of O2. Which reactant is the limiting reactant in this case? What mass of water can be produced? Which reactant is present in excess, and what mass of the reactant remains after the reaction is complete?

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3