Compound a contains 5.2% by mass of nitrogen as well as c, h and o. combustion of 0.0850 g of compound a gave 0.224 g of co2 and 0.0372 g of h2o. calculate the empirical formula of a?

14. many depressants reduce small muscle control, making it harder for a. you to steer b. your mind to consider complex problems c. the eye to scan, focus, or stay still d. the kidneys to filter alcohol out of the bloodstream

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

How hot is the suns corona? (integrated science)