9) Is there any other ratio of aluminum and oxygen ions that could exist? For instance, could you have Alz0 or AlO2? Explain your answer.

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

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

Which of the following statements are incorrect?