Which of the following correctly represents 360 g of water? (i) 2 moles of H20 (ii) 20 moles of water (iii) 6.022 × 1023 molecules of water (iv) 1.2044×1025 molecules of water (a) (i) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

Soln:

Answer is (d) (ii) and (iv)

Explanation:

Number of moles = Mass of water

Molar mass of water

Number of moles = 360g

12g/mol Number of moles = 20

Number of molecules = 20 x 6.022 x 10²³ = 1.2044 x 10²⁵ molecules of water Thus, option (d) is correct.