A sample of a compound was found that has 40.25g of carbon and 59.75g of oxygen. What is the empirical formula for this sample.

Iknow the answer is a but i don't know why

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

Why does his teacher ask him to balance the equation by including the correct coefficient