At a certain temperature and pressure, 0.20 mol of carbon dioxide has a volume of 3.1 l. a 3.1-l sample of hydrogen at the same temperature and pressure a. has the same mass b. contains the same number of atoms c. has a higher density d. contains the same number of molecules

A 3.1 L sample of hydrogen d. contains the same number of molecules

as 3.1 L of carbon dioxide at the same temperature and pressure.

This is the fundamental principle of Avogadro’s hypothesis: equal volume of gases at the same temperature and pressure contain the same number of molecules.

The sample of carbon dioxide has a greater mass, a greater number of atoms, and a greater density, than the sample of hydrogen.  

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /