Missing question: A sample of O2 with a volume of 5.00 L at specified temperature and pressure contains 1.08x10^23 molecules. How many molecules would be present in each of the following under the same conditions? a) 5.00 L H2. b) 5.00 L CO2. Utilize Avogadro's Law: Equal volumes of all gases, at constant temperature and pressure, contain the same number of molecules. Hence, for both hydrogen and carbon dioxide—being gases—the number of molecules will equal the oxygen molecules, thus: a) N(H₂) = 1.08·10²³. b) N(CO₂) = 1.08·10²³.
