All the following variables are used to describle gases except__________________?
Correct answer: D. density
- A. pressure
- B. volume
- C. moles
- D. density
Explanation
The ideal gas equation uses pressure, volume, temperature, and amount of gas in moles: PV = nRT. Density is a derived property that can be calculated from these variables, but it is not one of the basic variables in this equation. The likely mistake is choosing c by forgetting that the amount of gas is represented by n, the number of moles.
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About Ideal Gas Equation
The ideal gas equation, PV = nRT, relates pressure, volume, amount and absolute temperature when gas particles are assumed to have negligible volume and no intermolecular forces. Applications include finding molar mass, density or an unknown gas variable, with careful use of Kelvin temperature and consistent units, and comparison with real-gas behaviour.
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443 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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