0.7 l of h2 enters a reaction at standard temperature and pressure.
how many particles of h2 reacted?
2.69 x 1022 particles h2
1.88 x 1022 particles h2
1.35 x 1025 particles h2
4.21 x 1023 particles h2

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 mississippians were considered to be  horticulturalists, which means they were

What is the subscript for oxygen in its molecular formula