Which equation describes a reduction? Upper M g (s) right arrow Uper M g superscript 2 plus (a q) plus 2 e superscript minus. 2 upper C l plus 2 e superscript minus right arrow 2 upper C l superscript minus. Upper N a (s) right arrow upper N a superscript plus (a q) plus e superscript minus. Upper A l (s) right arrow upper A l superscript 3 plus (a q) plus 3 e superscript minus.

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?

The characteristics 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 an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.