葡萄糖C₆H₁₂O₆中氫元素的質(zhì)量分數(shù)=

1×12

180

×100%
乙酸CH₃COOH中氫元素的質(zhì)量分數(shù)=

1×4

60

×100%
尿素CO（NH₂）₂中氫元素的質(zhì)量分數(shù)=

1×4

60

×100%
∵葡萄糖C₆H₁₂O₆中氫元素的質(zhì)量分數(shù)=乙酸CH₃COOH中氫元素的質(zhì)量分數(shù)=尿素CO（NH₂）₂中氫元素的質(zhì)量分數(shù)
∴三種物質(zhì)的混合物中H元素質(zhì)量分數(shù)=

1×4

60

×100%
240g三種物質(zhì)的混合物中H元素質(zhì)量=240g×

1×4

60

×100%=16g
含16gH元素的水（H₂O）的質(zhì)量=

16g

1×2 18 ×100%

=144g
故選C．