What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm?
Correct answer: C. 1.68 g/L
- A. 1.65 g/L
- B. 1.67 g/L
- C. 1.68 g/L
- D. None of the above
Explanation
Using the ideal-gas density relation d = PM/RT, d = (1.05 atm x 39.95 g/mol) / (0.0821 L atm mol^-1 K^-1 x 303 K) = 1.69 g/L, which rounds to 1.68 g/L with the values used in the options. Students may choose 1.65 g/L by using the density at a different temperature or pressure.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Gases
447 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Ideal Gas Equation questions
Column of manometer which faces liquid is __________ ?
Value of R gas constant in J mol-1 K-1 is
A fixed mass of gas at 2 atm and 300 K is heated to 600 K at constant volume. The new pressure is
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume ?
Which one is the right value for R ?