Question

The molar mass of two equally sized samples of unknown gaseous compounds is shown in the table. Molar Mass Comparison Gas Molar Mass A 17 g/mol B 36.5 g/mol Which statement describes the density and diffusion of both gases at STP? Gas A has a higher density and diffuses faster than Gas B. Gas A has a higher density and diffuses slower than Gas B. Gas A has a lower density and diffuses faster than Gas B Gas A has a lower density and diffuses slower than Gas B.

Answer 1

Answer:

Effusion  is the process of a gas being poured out through a hole diametrically smaller than the structural exit of the container.

A lighter gas effuses faster than a heavier gas.

Thus gas A has a lower density and effuses slower than Gas B.

Explanation:

Answer 2

The gas with a lower molar mass will have a lower density and diffuses at a slower rate. Thus gas A has a lower density than gas B and diffuses slower than gas B.

Three points should be noted here;

1. The density of any substance is related to the molar mass.
2. $D=M/V$, where $D$ is the density, $M$ is the mass and $V$ is the volume of the substance.
3. The density of the gas is directly proportional to the molar mass of the gas.

Hence the gas A has lower density and the gas B has higher density as the molar mass of A is $17 g/mol$ and of B is $36.5 g/mol$.

About Diffusion please note the below points;

• Diffusion is the process of movement of a substance from the area of higher concentration to the area of lower concentration.
• The gas with a smaller mass will diffuse slower in rate than the gas with a higher mass.

Hence the gas A diffuses slower in rate than gas B.

Thus the correct answer is "Gas A has a lower density and diffuses slower than Gas B".

Learn more about the density of gas here: https://brainly.in/questions/16376906