List three physical properties of copper

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?