you need
  • periodic table, pressure gauges, thermometers, scales.
Guide
1
Determination of the molar mass of the substance chemical formula.Find items in the periodic table that match the atoms that make up the molecule of the substance .If the molecule monatomic substance, then that will be its molar mass.If not, get the atomic weight each element, and fold the masses.The result is the molar mass of the substance , expressed in grams per mole.
2
Determination of the molar mass of the substance by weight of one molecule.In that case, if we know the mass of a s
ingle molecule, it is in grams, then multiply by the number of molecules in one mole of any substance , which accounts for 6,022 • 10 ^ 23 (Avogadro's number).Get molar mass substance in grams per mole.
3
Determination of the molar mass of the gas.Take a balloon that can be hermetically sealed with a known volume which translate in cubic meters.With the help of a pump with a gas pump out, and weigh in the balance the empty bottle.Then fill it with gas, the molar mass is measured.Again weigh tank.The difference in the weight of the empty cylinder and the injected gas will be equal to the mass of the gas, to express it in grams.
With pressure gauge to measure the pressure of the gas inside the balloon, this attach it to the hole for gas injection.You can just use the bulb with built-in pressure gauge to monitor the performance of operational pressure.The pressure is measured in Pascals.
4
Wait a while for the temperature of the gas inside the cylinder of the temperature of the environment, and measure it with a thermometer.Outside temperature display from degrees Celsius move in Kelvin, which add to the measured number 273.
mass of the gas temperature and multiply by the universal gas constant (8.31).The resulting number series divide on pressure and volume (M = m • 8,31 • T / (P • V)).The result is the molar mass of the gas in grams per mole.