Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK202510 May 2025Morning ShiftChemistrySome Basic Concepts of ChemistryActual

If X is a haloalkane with a single Chlorine atom per molecule and the percentage of Cl is 55 , what would be the number of Cl atoms present in 0.1 g of the haloalkane? Atomic mass of Cl =35.5 ~g / mol

Options

  1. A9.329 10²³
  2. B6.022 10²²
  3. C1.2044 10²¹
  4. D9.328 10²⁰

Correct answer

D. 9.328 10²⁰

Step-by-step solution

Let the molar mass of the haloalkane be M g/mol. The percentage of Chlorine is given as 55 % . Since there is one Chlorine atom per molecule, the mass of Chlorine in one mole of the haloalkane is 35.5 g. Therefore, 35.5 M 100 = 55 . M = 35.5 100 55 = 3550 55 64.545 g/mol. The number of moles of the haloalkane in 0.1 g is n = 0.1 64.545 0.001549 moles. Since each molecule contains one Chlorine atom, the number of moles of Chlorine atoms is equal to the number of moles of the haloalkane, which is 0.001549 moles. The

Practice Some Basic Concepts of Chemistry on Quantrex Academy →

More from Some Basic Concepts of Chemistry

How many molecules of C O₂ (g) are obtained on reaction of 24 grams of methane with 4moles of oxygen? 2026500 mL of an aqueous solution of glucose C₆ H₁₂ O₆ (Molar mass 180 gmol ⁻¹ ) contains 6.02 10²² molecules. The concentration of the solution will be: 2026The mass of precipitate formed when 50 mL of 16.9% aqueous solution of AgNO ₃ is mixed with 50 mL of 5.8% NaCl solution is------------g [Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 3 2026100 mL of 1.0 M aqueous NaOH solution was diluted to 1.0 L by adding water. Half of this solution was discarded. A new 100 mL of 0.5 M aqueous NaOH solution was added to the remain 2026From the given information, select the suitable law of chemical combination: Cupric Carbonate % of Cu % of C % of O Natural Sample 51.35 9.74 38.91 Synthetic Sample 51.35 9.74 38.9 2026Match List-I with List-II and select the correct option (Based on mole concept): List-I List-II (a) 2 moles of ethene (i) 11.2 L volume at STP (b) Mass is equal to 66 g (ii) 56 g ( 2026The mass of a mixture containing NaCl and NaBr is 4.0 g. If Na is 30 % of the total mixture, the composition of NaCl in the mixture is 2025Two acids A and B are titrated separately. 25 mL of 0.5 M Na ₂ CO ₃ solution requires 10 mL of A and 40 mL of B for complete neutralisation. The volume (in L) of A and B required t 2025 Full Some Basic Concepts of Chemistry list All COMEDK PYQs