How many atoms of Ca are in 1.65 mol of CA? Be sure to show your work and each step is writing out clearly.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

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

Which of the following is true about the speed of light? it depends on the wavelength.