What is the chemical formula for a compound between Al and S?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

The identities of substances are the same before and after which type of change

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?