Freon-12 (ccl2f2) is used as a refrigerant in air conditioners and as a propellant in aerosol cans. calculate the number of molecules of freon-12 in 5.56 mg of freon-12. what is the mass of chlorine in 5.56 mg of freon-12?

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

The three types is stress that act on earths rocks are compression, tension, and