Explanation

Graham's Law of Diffusion states that the rate of diffusion of a gas is inversely proportional to the square root of its molar mass.

$$\text{<font color="\#0000ff"><b>Rate</b></font>}<font\; color="\#0000ff"><b>\propto </b></font>\frac{\mathrm{<font\; color="\#0000ff"><b>1</b></font>}}{\sqrt{\mathrm{<font\; color="\#0000ff"><b>M</b></font>}}}$$

Compare molar masses:

CH₄ (Methane): 16 g/mol

N₂ (Nitrogen): 28 g/mol

O₂ (Oxygen): 32 g/mol

H₂ (Hydrogen): 2 g/mol (lightest)

Since H₂ has the smallest molar mass, it diffuses the most rapidly.

Explanation

The alkane, known as a primary natural gas component, is methane (CH4).

Formation:

It forms from the decomposition of organic matter, like plants and animals, under high temperature and pressure deep underground over millions of years. 

Fuel Use:

Natural gas is primarily used as a fuel for heating, cooking, and electricity generation. 

Explanation

Hydrogen is present in the atmosphere in trace amounts, making it the least common among the listed gases.

Nitrogen (~78%), Oxygen (~21%), and Argon (~0.93%) are much more abundant.

Explanation

Radon (Rn) is a radioactive gas formed from the decay of uranium and radium found in rocks and soil.

He (Helium): Helium is present in trace amounts in the atmosphere.

Ne (Neon): Neon is also present in trace amounts in the atmosphere.

Ar (Argon): Argon is the most abundant noble gas in Earth's atmosphere, making up about 0.93% of the air. 

Explanation

The term fluids refers to both liquids and gases, as they can flow.

Liquids specifically are also classified under fluids because of their ability to take the shape of a container.