Transcript Stoichiometry

Stoichiometry
pg. 81
Mole to mass
start with given
use mole to mole conversions to get to moles
use molar mass to convert to mass
Determine the mass of sodium chloride
produced when 1.25 moles of chlorine gas
reacts with sodium.
Mass to mass
used when we are carrying out a reaction in the lab
start with given
use molar mass to convert to moles
use mole to mole ratio to convert to moles of the other
substance
use molar mass to get the mass of the new substance
Ammonium nitrate (NH4NO3), an important fertilizer,
produces N2O gas and H2O when it decomposes.
Determine the mass of water produced from the
decomposition of 25.0 g of solid ammonium nitrate.
Practice
If you begin with 1.25 mole of TiO2, what mass
of Cl2 is needed?
TiO2 + C +2Cl2  TiCl4 +CO2
One in a series of reactions that inflate air
bags in automobiles is the decomposition of
sodium azide . Determine the mass of N2
produced if 100.0 g NaN3 is decomposed.
2NaN3  2Na + 3 N2