if you opened a container of each gas in a corner of a large room, which odor would you detect first on the…

if you opened a container of each gas in a corner of a large room, which odor would you detect first on the other side of the room?\n○ h₂s\n○ nh₃\n○ cannot be determined\ndone

if you opened a container of each gas in a corner of a large room, which odor would you detect first on the other side of the room?\n○ h₂s\n○ nh₃\n○ cannot be determined\ndone

Answer

Explanation:

Step1: Recall Graham's law of effusion

According to Graham's law, the rate of diffusion of a gas is inversely proportional to the square - root of its molar mass ($r\propto\frac{1}{\sqrt{M}}$). The lower the molar mass, the faster the gas diffuses.

Step2: Calculate molar masses

The molar mass of $H_2S$: $M_{H_2S}=2\times1 + 32=34\ g/mol$. The molar mass of $NH_3$: $M_{NH_3}=14 + 3\times1 = 17\ g/mol$.

Step3: Compare diffusion rates

Since $NH_3$ has a lower molar mass than $H_2S$, $NH_3$ will diffuse faster. So the odor of $NH_3$ will be detected first.

Answer:

$NH_3$