2. How many moles of gallium chlorate, Ga(ClO3)3, must react in order to produce 674 kJ of
energy according to the following reaction? (5 pts)
2 Ga(ClO3)3 + 2 GaCl3 + 902 AH = - 130.4 kJ

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