Question

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​

Answer 1

Answer: Correct answer is b) 20 moles of water

Explanation:

Because 1 mole of water molecules weight is - 18 g

So, 20 moles of water molecules weight will be (20×18)g = 360g

Answer 2

Answer:

=> The molar mass of water is 18 g/mol.

=> 360 g of water corresponds to

360/18=20mol.

=> It is also equal to 20mol×6.023×10*23molecules/mol= 1.2044×10*25 molecules.

=> Thus, the options (ii) and (iv) correctly represents 360 g of water.