Practice question
Question
A 10 L sample of a gas at STP weighs 11.6 g and contains only C and H. If it produces 3.38 g CO₂ on burning, what is its molecular formula? (Atomic masses: C = 12, H = 1)
Explanation
Moles of gas ≈ 0.446 mol; molar mass ≈ 26 g/mol. Mass of C ≈ 0.922 g; C atoms per molecule adjusted to 1 (or 2 for C₂H₂). Molecular formula consistent with C₂H₂ (molar mass 26).
Related blogs
Guides and insights connected to this topic
Hardy-Weinberg Equilibrium: Conditions, Equation, Inference, Applications and Sample Problem with Sickle Cell Anemia
Understand the Hardy‑Weinberg principle, its assumptions, the p²+2pq+q² equation, and a worked example involving sickle‑cell anemia.
TRUST (Toludine Red Unheated Serum Test) For Syphilis
Principle The TRUST reagent containing modified VDRL antigen and toludine red pigment particles, flocclulate when mixed with sample containi...
RPR (Rapid Plasma Reagin ) test for Syphilis
Principle The RPR reagent containing modified VDRL antigen and microparticulate carbon particles, flocculate when mixed with sample containi...
Discussion
Comments
Please log in to join the discussion.
Login to commentNo comments yet. Be the first to start the discussion.