Which of the following correctly represents `360 g` of water?
(i) `2` moles of `H_(2)O`
(ii) `20` moles of water.
(iii) `6.022 xx 10^(23)` molecules of water.
(iv) `1.2044 xx 10^(25)` molecules of water.

Options

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

Answer

D

Explanation

(d) (ii) `("Mass of water")/("Molar mass of water")`
`=((360 g))/((18 g"mol"^(-1)))=20 ` mol
(iv) 18 g of water represent molecules
`=6.022xx10^(23)`
360 g of water represent molecules
`=((6.022xx10^(23)))/((18g)) xx(360g)`
`=6.022xx10^(23) xx20 =1.2044xx10^(25)`