Which of the following is not a true statement? o a metal ion can form a complex with water, thereby increasing water's acidity. o a metal ion can make a reaction center more susceptible to receiving electrons o a metal ion can make a leaving group a weaker base. o metal-bound hydroxide is a poorer nucleophile than water. 0 the pka of a metal-bound water depends on the metal ion.

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false