During a titration of hydrochloric acid with sodium hydroxide, which of the following statements describes the equivalence point?1-Only water is present.2-There is no acid or base present.3-An excess of base is present.4-An excess of acid is present.

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

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Adilute aqueous potassium nitrate solution is