Challenge Questions: Balance the equations below.
___ NaNO3 + ___ PbO → ___ Pb(NO3)2 + ___ Na2O
___ Ca3P2 + ___ H2O → ___Ca(OH)2 + ___ PH3
___Fe2O3 + ___ CO → ___Fe + ___ CO2
___NH3 + ___ O2 → ___ NO2 + ___ H2O
___FeS + ___O2 → ___Fe2O3 + ___SO2
___ C3H6O2 + ___ O2 → ___ CO2 + ___ H2O

2 NaNO3 + 1 PbO --> 1 Pb(NO3)2 + 1 Na2O

1 Ca3P2 + 6 H2O --> 3 Ca(OH)2 + 2 PH3

1 Fe2O3 + 3 CO --> 2 Fe + 3 CO2

4 NH3 + 7 O2 --> 4 NO2 + 6 H2O

4 FeS + 7 O2 --> 2 Fe2O3 + 4 SO2

2 C3H6O2 + 7 O2 --> 6 CO2 + 6 H2O

Explanation:

balance equations by giving compounds in the reactants and products whole-number coefficients that result in the same number of each element on both sides of the equation

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)