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determining the molar mass of a gas (36 points) trial 1 trial 2 (if needed) volatile liquid used expected molar mass of volatile liquid (g/mol) mass of flask, foil and rubber band (g) mass of flask, foil, rubber band and condensed liquid (g) mass of condensed liquid (g) * volume of flask, in liters (l) barometric pressure (mmhg) atmospheric pressure (atm) * temperature of boiling water (k) experimental molar mass of unknown liquid (g/mol) * percent error*

Answer :

1 = Make a list of the known quantities and formulate the issue.

2 = n=PVRT=0.987atm×0.677L0.08206L⋅atm/K⋅mol×296K=0.0275mol. Get the molar mass now by dividing g by mol.

The molar mass of a gas at STP can be determined in what way?

At STP, the molar volume of a gas (22.4 liter/mole) and molar mass (22.4 lb/mole) are employed in the calculation D=M/V. Remember the Avogadro Principle for Gases (1811), which states that equal volumes of all gases under the same conditions contain the same amount of molecules.

The molar gas equation is what?

PV = nRT, where n is the number of moles of the given gas, P is the gas's pressure, V is its volume, T is its absolute temperature, and P is the gas's volume.

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