Calculate the change in free-energy associated with the formation of a critical spherical nucleus. in pure liquid nickel that is 192 ºc undercooled. the answer should be given in atto-joules with 1 decimal of accuracy. (note the metric prefix atto is 10-18) properties of nickel: heat of fusion 2660 j/cm3; surface energy 255x10-7 j/cm2 ; freezing temperature 1453 ºc, volume free energy -728.99 j/cm3 .

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

What is the mass of 0.46 mol of mgcl2