HgO decomposes when exposed to heat: 2HgO ---> 2Hg + O2 \DeltaΔH = +181.6 What mass of O2 can be made with 100.0 kJ? Use 16 g/mol = O Your answer should be written with 3 significant figures.

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

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

What is the percentage of hydrogen in nitrogen trihydride