Copper has two naturally occurring isotopes. The isotope Cu-63 (mass 62.93amu) makes up 69.17% of the sample, and the isotope Cu-65 (mass =
64.98amu) makes up 30.83% of the sample. What is the average atomic
mass for chlorine?

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.

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i

Wagons/motorized vehicles