The nitrogen atoms in a molecule of n2 share a total of
(1) one pair of electrons
(2) one pair of protons
(3) three pairs of electrons
(4) three pairs of protons

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle