Which of the following has the maximum mass
(a) 20 g of phosphorus
(b) 5 moles of water
(c) `12 xx 10^(24)` atoms of hydrogen ?

Answer

5 moles of water

Explanation

(a) 20 gram of phosphorus = 20.0 g
(b) 1 gram mole of water = 18.0 g
5 gram moles moles water `= 18.0 xx 5 = 90.0 g`
(c) `6.022 xx 10^(23)` atoms of hydrogen = 1.0 g
`12.0 xx 10^(24)` atoms of hydrogen `= (12.0 xx10^(24))/(6.022xx10^(23))=19.93g`
5 moles of water have maximum mass = 90.0 g.