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 in 126 grams of water?
Choices.
A) 110	B) 112	C) 114	D) 116	E) 118
(16/18)*126= 
<gadget id="calculator">(16/18)*126</gadget>
<output>112</output>
112 grams   The answer is 112.
<result>B</result>
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 in 126 grams of water?