determine the molality and mole fraction of concentrated aqueous hcl, which is 12.0 m and has a density of 1.19 g/ml.

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

Hope the image of the frequency formula

The correct answer is weight.

It would be true sodium reacts with water in a violent way