1. Which of the following correctly represents 360g of water?
(i) 2 moles of water
(ii) 20 moles of water
(iii) 6.022 × 1023 molecules of water
(iv) 1.2044 × 1025 molecules of water
Answers
Answered by
3
Answer:
● The correct options are:
(ii) 20 moles of water
(iv) 1.2044 × 10*25 molecules of water
Answered by
9
Answer :-
Option (ii) 20 moles of water and Option (iv) 1.2044×10²⁵ molecules of water, correctly represents 360g of water.
Explanation:-
• Molar mass of Hydrogen (H) = 1g/mol
• Molar mass of Oxygen (O) = 16g/mol
• Avogadro Number = 6.022×10²³
Hence, molar mass of water [H₂O] :-
= 1×2+16
= 18g/mol
Number of moles in 360g of water :-
= Given Mass/Molar mass
= 360/18
= 20 moles ✓
Number of molecules in 360g of water :-
= No of moles × Avogadro Number
= 20×6.022×10²³
= 120.44×10²³
= 1.2044×10²⁵ molecules ✓
Hence , option (ii) and (iv) are correct !
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