Which of the following correctly represents 180 g of water ?
5 moles of water
(ii) 10 moles of water
(iii) `6.023xx10^23` molecules of water
(iv) `6.023xx10^24` molecules of water

Options

A. (i) and (ii)
B. (i) and (iv)
C. (ii) and (iv)
D. (ii) and (iii)

Answer

C

Explanation

18g of `H_2O`=1 mol
180g of `H_2O` = 10 mol
18g of `H_2O=6.023xx10^23 " molecules of " H_2O`
180g of `H_2O = (6.023xx10^23)/(18)xx180`
`=6.023xx10^24 " molecules of " H_2O`