What is the molar mass of ch4 (c=12.011 amu h = 1.008 amu)

Which statement is best described as a atom

In which phase(s) do the molecules take the shape of the container?

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