What is the formula for Iron (II) acetate?

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

State one important difference between a physical change and a chemical change?