Which of the following correctly represents 360 g of water?
  1. 2 moles of H2O
  2. 20 moles of water
  3. 6.022 × 1023 molecules of water
  4. 1.2044 × 1025 molecules of water

  5. (a) (i)
    (b) (i) and (iv)
    (c) (ii) and (iii)
    (d) (ii) and (iv)

AcademicChemistryNCERTClass 9

Correct Answer: (d) (ii) and (iv)

Explanation: Number of moles = Mass of water / Molar mass of water

Number of moles = 360g / 18 g/mol

Number of moles = 20

Number of molecules = 20 x 6.022 x 1023 = 1.2044 x 1025 molecules of water.

Hence, 20 moles of water and 1.2044×1025 molecules of water correctly represent 360 gms of water.  

raja
Updated on 10-Oct-2022 13:30:05

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