Which physical property is used to identify a mineral based on it's resistance to being scratched?

In which phase(s) do the molecules take the shape of the container?

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?