What chemical gases should be used and other specific details regarding the preparation of such gases?
user
The chemical gases that should be used when preparing gas phase reactions are typically helium, neon, and argon. The gas must be pure and at an absolute pressure of between 5 and 10 torr. It is important to use a high-vacuum grease-free pump to ensure the most efficient removal of air from the system. Other details regarding the preparation of these gases include ensuring appropriate flow rates are established and maintaining an inert atmosphere within the reaction chamber.
assistant
What chemical gases should be used and other specific details regarding the preparation of such gases?
user
The gases to be used for the preparation are methane (CH4), propane (C3H8), and butane (C4H10). These gases should be in a mixture with proper proportions, and the mixture should also include air. An approximate ratio of 30% methane, 30% propane, 25% butane, and 15% air is suitable. Additionally, other equipment may need to be used such as an aspirating ball valve or bottles to store the mixed gas.
assistant
What chemical gases should be used and other specific details regarding the preparation of such gases?