The correct number of significant figures in the number 1.250100 is:

The correct number of sig figs for this number is 7 because all whole numbers count and all zeros after the decimal counts too. So, all the numbers count, which is 7.

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.