Magnesium reacts with ammonia, NH3, at high temperatures to produce solid magnesium nitride, Mg3N2, and hydrogen. How many grams of magnesium reacts with 16,400 mL (STP) of ammonia? 3Mg(s) + 2NH3(g) Mg3N2(s) + 3H2(g)

please show steps ^-^

Which best explains why an iceberg floats?

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?