2 C4H10 + 13 O2--> 8 CO2 + 10 H2O How many molecules of CO2 are produced from the combustion of 100 grams of butane (C4H10)?

Copper, silver, aluminum, cobalt, chromium, mercury 

Ithink iit might be

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).

The answer is january : )