What substitution can be made in the ideal gas law?

Rearrange the ideal gas law to solve for molar mass

Rearrange the ideal gas law to solve for density

Calculate the density a gas will have at 5 oC and 1.25 atm if its molar mass is 39.9 g/mol.

Daily ScienceApril 1, 2015

Gas StoichiometryPg. 101

Says regardless of size of particles, the volume will be the same at the same temperature and pressure

1000 particles of krypton has same volume as 1000 particles of hydrogen at same P and T

Molar volume- volume that one mole of substance occupies at 0.00 oC and 1 atm (standard temperature and pressure)

At STP, 1 mole of gas occupies 22.4 L

Avogadro’s principle

Ex. Calculate the volume that 0.881 mol of gas at STP will occupy

How many grams of carbon dioxide gas are in a 1.0 L balloon at STP?

Determine the volume of a container that holds 2.4 mol of gas at STP.

Using Avogadro’s principle

Masses given must be converted to moles first

Ex. Ammonium nitrate is a common ingredient in chemical fertilizers. Use the reaction shown to calculate the mass of solid ammonium nitrate that must be used to obtain 0.100 L of dinitrogen oxide gas at STP.◦ NH4NO3 N2O +2H2O

Gas stoichiometry- volume to mass