13. (a) if h2s gas is led into a solution of 0.10m fecl2 , what is the highest ph value be controlled in the solution for just no fes precipitate forming?
(b) if h2s gas is led into a solution that is 0.10m each in fecl2 and cucl2 , will fes precipitate from the solution?
(the saturated solution of h2s in water is 0.10m at 25 degrees celsius, 1atm.)

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?

The minerals found in bones are deposited by living cells called

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.