1) What coefficients are needed to balance this reaction? fill in the blanks
_Mg(NO3)2 --> _Mg(NO2)2 + _ O2

2) Calculate the molar mass of Cr4(P2O7)3. Make sure to round off atomic masses to the nearest whole number.
Cr = _ x _ = _
P = _ x _ = _
O = _ x _ = _
Molar mass = _g/mol

3) Interpret the following BALANCED equation by completing each statement below: 2 AL2O3 -> 4 AL + 3 O2
(1) The reaction above is an example of a __ (synthesis/decomposition/replacemen t/combustion)
(2) It means _ moles of AL2O3 decompose to produce _ moles of AL and _ moles of O2
(3) The mole ratio between AL2O3 and AL is _ moles AL2O3/ _ moles AL
(4) The mole ratio between AL and O2 is _ moles AL/ _ moles O2
(5) The mole ratio between AL2O3 and O2 is _ moles AL2O3/ _ moles O2