N2 + 3H2 --> 2NH3 What is the VOLUME of NH3 at STP is produced if 25.0 g of N2 is reacted with an excess of H2

If you want to create an electrical current, which situation would produce a solution capable of this

What effect might melting sea ice have for people who live in coastal areas?

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.