10.2. Mass, Volume, and the Mole http://www.ck12.org
d. 25.0 mL of Ne gas (at STP) to atoms- What is the density in g/L of each of the following gases at STP?
a. Cl 2
b. He - A certain gas has a density of 2.054 g/L at STP. Calculate its molar mass. If the gas is known to consist of
only nitrogen and oxygen, what is its formula? - Determine the number of C, H, and O atoms in 50.0 g of sucrose, C 12 H 22 O 11.
- The density of aluminum metal is 2.70 g/cm^3. How many aluminum atoms are present in a cube of aluminum
that measures 1.50 cm on each side?
Further Reading / Supplemental Links
- Gram/Mole/VolumeConversions, (http://www.sciencegeek.net/Chemistry/taters/Unit4GramMoleVolume.htm
Points to Consider
The chemical formula of an ionic compound is an empirical formula, the simplest ratio between cations and anions
in the crystal. The chemical formula of a molecular compound shows the number of each atom present in the
compound.
- How is the composition of a compound related to its formula?
- How can mole calculations be used to analyze chemical formulas?