Ratio problem

Water consists of hydrogen and oxygen, and the approximate ratio ,by mass, of hydrogen to oxygen is 2:16
Approximately how many grams of oxygen are there is 144 gms of water?

A)16

B)72

C)112

D)128

E)142

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liferocks: Legendary Member; Posts: 576; Joined: Sat Mar 13, 2010 8:31 pm; Thanked: 97 times; Followed by:1 members

by liferocks » Fri May 21, 2010 7:47 am

Amount of oxygen=[spoiler]144*16/18=8*16=128[/spoiler]

Ans option D

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