Calculations of Formula Mass

Determine the mass of each of the following compounds, rounding molar masses of elements to the gram before adding up the total. DO NOT USE A CALCULATOR!

CH4 (methane) = gramsC2H6 (ethane) = grams
C3H8 (propane) = gramsN2O4 (dinitrogen tetroxide) = grams
K2O (potassium oxide) = gramsNaF (sodium fluoride) = grams
MnO2 (manganese(IV) oxide) = gramsNH4OH (ammonium hydroxide) = grams
CS2 (carbon disulfide) = gramsCa(NO3)2 (calcium nitrate) = grams
C6H12O6 (glucose) = gramsCaBr2 (Calcium bromide) = grams
SiF4 (silicon tetrafluoride) = gramsTm2O3 (thulium(III) oxide) = grams
UF6 (uranium hexafluoride) = gramsCa3N2 (calcium nitride) = grams
(NH4)2CO3 (ammonium carbonate) = gramsNa3P (sodium phosphide) = grams
FeSO4·7H2O (iron(II) sulfate heptahydrate) = grams