An oxide of phosphorus contains 56.4% phosphorus and 43.6% oxygen. it's relative molecular mass is 220. find both the empirical and the molecular formula of the oxide'

An occluded front moves over the farmland that has been experiencing drought conditions. what change in weather will this front likely bring? a. gray skies, but no rain b. an extended period of rain c. more dry air and sunny skies d. violent, short-lived thunderstorms

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

In which reaction is precipitation occurring?