The illustration depicts an electrochemical cell.
(A battery connected to a silver metal plate on the left, and an aluminum plate on the right, which are both submersed in a beaker of A g N O 3 solution. Dots and arrows in the water indicate movement from the silver to the aluminum.)
Which kind of work would not be appropriate for this type of cell?
1. powering a light bulb
2. splitting water into hydrogen and oxygen
3. purifying a metal ore
4. electroplating

When the volume and number of particles of a gas are constant which of the following is also constant

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

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains