CHOOSE ALL THE ANSWERS THAT APPLY. Which of the following equations are balanced? O 2Fe + Cu(NO 3) 2 → 2Cu + Fe(NO 3) 2
O 2K + 2H 2O → H 2 + 2KOH
O Li + Cl 2 → LiCl
O 2H 2 + O 2 → 2H 2O
O 2S + 3O 2 → 2SO 3

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