To determine the amount of a specific gas in the air, different methods and set-ups are used depending on the gas being measured. Here's a brief analysis of each option:

A. **Oxygen in Air**: This can be determined using methods such as gas chromatography or paramagnetic sensors.

B. **Water Vapour in Air**: This often involves hygrometers or other humidity measuring devices.

C. **CO2 in Air**: This is typically measured using infrared sensors or gas chromatography.

D. **Arygen in Air**: It seems like "arygen" may be a typo, possibly referring to "argon," which is an inert gas found in air but is usually measured using gas chromatography as well.

### Final Answer
The set-up would most likely be useful for determining **C. CO2 in air**, as specific methods are tailored for measuring carbon dioxide concentrations.

Question

To determine the amount of a specific gas in the air, different methods and set-ups are used depending on the gas being measured. Here's a brief analysis of each option:

A. **Oxygen in Air**: This can be determined using methods such as gas chromatography or paramagnetic sensors.

B. **Water Vapour in Air**: This often involves hygrometers or other humidity measuring devices.

C. **CO2 in Air**: This is typically measured using infrared sensors or gas chromatography.

D. **Arygen in Air**: It seems like "arygen" may be a typo, possibly referring to "argon," which is an inert gas found in air but is usually measured using gas chromatography as well.

### Final Answer
The set-up would most likely be useful for determining **C. CO2 in air**, as specific methods are tailored for measuring carbon dioxide concentrations.

Knowee AI · Accepted Answer

To determine the amount of a specific gas in the air, different methods and set-ups are used depending on the gas being measured. Here's a brief analysis of each option:

A. **Oxygen in Air**: This can be determined using methods such as gas chromatography or paramagnetic sensors.

B. **Water Vapour in Air**: This often involves hygrometers or other humidity measuring devices.

C. **CO2 in Air**: This is typically measured using infrared sensors or gas chromatography.

D. **Arygen in Air**: It seems like "arygen" may be a typo, possibly referring to "argon," which is an inert gas found in air but is usually measured using gas chromatography as well.

### Final Answer
The set-up would most likely be useful for determining **C. CO2 in air**, as specific methods are tailored for measuring carbon dioxide concentrations.

The set-up above would be useful for determining the amount of A.oxygen in air B.water vapour in air C.CO2 in air D.arygen in air

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