A gas occupies 2 dm³ at 5 atm. What volume does it occupy at 25 atm and constant temperature?
Answer and explanation
Correct answer: D. 0.4 dm³
- Step 1: Boyle's law: P₁V₁ = P₂V₂. Step 2. V₂ = 5 × 2 ÷ 25 = 0.4 dm³. Answer: 0.4 dm³. Why not the others: 10 dm³ is what you get if you multiply instead of dividing. 7 dm³ is what you get if you add the factor. 0.08 dm³ is what you get if you divide by the factor twice.
Practise more Mole concept, solutions and stoichiometry.
Free questions with an explanation for every one, and full timed WBJEE mock tests.
More Mole concept, solutions and stoichiometry questions
- How many carbon dioxide molecules are present in 5 mol of CO₂? (Avogadro constant = 6.02 × 10²³ per mol)
- What is the molar mass of HNO₃? (H = 1, C = 12, N = 14, O = 16, Na = 23, Mg = 24, Al = 27, S = 32, Cl = 35.5, K = 39, Ca = 40, Mn = 55, Fe =…
- How many moles are there in 29.25 g of NaCl? (molar mass 58.5 g/mol)
- What is the mass of 5 mol of MgO? (molar mass 40 g/mol)
- 6 dm³ of a gas at 200 K is brought to 150 K at constant pressure. What is the new volume?
- How many methane molecules are present in 5 mol of CH₄? (Avogadro constant = 6.02 × 10²³ per mol)