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

I. 2 moles of `H_2O = 2 xx 18 g = 36 g`
II. 20 moles of `H_2O = 20 xx 18 g =360 g`

III. `6.022 xx 10^23` molecules of `H_2O = 18 g`
IV. `1.2044 xx 10^25` molecules of `H_2O = 18/(6.022 xx 10^(23)) xx 1.2044 xx 10^(25) = 360 g`