The flask diagrammed above contains hydrogen and oxygen gas. when a spark is touched to the flask they combine to form water. if the original reaction mixture contains more oxygen gas, the amount of water produced would a. increase b. decrease c. stay the same d. the answer depends on the amount of oxygen added

When the following equation is balanced using the smallest possible integers, what is the coefficent of oxygen gas? c7h16o(g) + o2(g) → co2(g) + h2o(g) -1 -5 -8 -16 -21

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

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