Question

I have filled in two glass gas bulbs with the same pressure of two different gasses: hydrogen gas (H2) and propane gas (CH,CH,CH3). The gas bulbs have the same volume and are also kept at the same temperature. Which of the two bulbs contains more molecules of gas? Select one: a. The bulb filled with propane contains more molecules, because propane has a greater molar mass than hydrogen b. The bulb filled with propane contains more molecules, because one propane molecule contains more atoms than hydrogen c. The bulb filled with hydrogen contains more molecules, because the molecules of H, occupy less volume d. The bulbs contain the same number of moles, therefore they contain the same number of molecules Consider the reaction 4 Al(s) + 3 02 (9) - 2 A1,0, (s) AH" = -3351 kJ In which of the following cases the energy released is the most? Select one: a. 2 moles of Al2O3(s) being formed b. 6 moles of Oz(s) being reacted c. 6 moles of Al(s) being reacted All of the above will release the same amount of energy