Which gas is most dense at 1 atm and 25 $\circ$ C?
A) Hydrogen cyanide
B) Hydrogen sulfide
C) Nitrogen monoxide
D) Carbon monoxide
E) Nitrogen dioxide

Question

Quizplus · Accepted Answer

Nitrogen dioxide (NO2) is the most dense among the options given at 1 atm and 25°C due to its higher molar mass compared to the other gases listed. Density of a gas is directly proportional to its molar mass under the same conditions of temperature and pressure.

Which Gas Is Most Dense at 1 Atm and 25 ∘\circ∘

Which Gas Is Most Dense at 1 Atm and 25^$\circ$