Molar Volume

According to Avogadro, 1 mol of any gas will occupy 22.4 L if:

• The container is at 100°C

• Only one type of gas is present

• The gases are at standard temperature and pressure

• If the gas contains carbon atoms

What formula can I use to calculate the number of moles of carbon dioxide gas given the volume that the gas occupies (at STP)?

What is the volume of Ne(g) in a balloon given that there are 0.500 mol of gas present (at STP)?

• 0.0223 L

• 11.2 L

• 44.8 L

• 11.2 mol

How many moles of nitrogen gas are present at STP in a 70 L cylinder? (Hint: watch your significant digits!)

• 0.320 mol

• 22.4 mol

• 3.125 mol

• 3.13 mol

In order to calculate the VOLUME that a gas occupies from its MASS, first use ___, and then use ___.

Calculate the number of carbon dioxide gas (CO2) molecules given that they occupy 20.0 L of space. Assume this takes place at STP.

• Not given enough information to calculate.

Gas density (d) is defined as the mass (in grams) of a substance divided by its volume (in litres). The equation would be: d = m/V. Determine the density of a sample of N2 (g) given that there are 0.100 mol on N2 (g) occupying 2.24 L at STP.

Note: this is a THIRD LEVEL PROBLEM.

• 0.0446 g/L

• 1.25 g/L

• 0.00159 g/L

• 0.625 g/L