Question

Which of the following correctly represents 360 g of water?
(i) 2 moles of water
(ii) 20 moles of water
(iii) 6.022×10
23
molecules of water
(iv) 1.2044×10
25
molecules of water

Answer 1

Answer:

mass of 1 mole of water =

18 gram

so 18 gram contain 1 mole.

1 gram will contain 1/18

360 gram will contain 1/18 ×360 = 20 moles

molecule = avogadro × 20

= 1.2044 × 10^25

so A and D are correct

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 (d) (ii) and (iv) correctly represents 360 g of water.