Does anybody know the answer to these two questions ?

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

What is the mass of 0.46 mil of mgcl2

How many neutrons does an element have if its atomic number is 50 and its mass number is 166