what observation is seen when you dissolve hydrated ammonium iron(III) in water and add acidified barium chloride solution

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?

Most metamorphosis processes take place

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol