Question

Given what you know about the human body, what do you think accounts for the high percentage of oxygen (65.0%)? Given what you know about the human body, what do you think accounts for the high percentage of oxygen (65.0%)? The human body is made up mainly of water, and there are two oxygen atoms in every water molecule. The human body is made up mainly of water, and there is one oxygen atom in every water molecule. The human body breathes in oxygen constantly, and because oxygen is a heavy element, it makes up a large percentage of body mass. The human body breathes in oxygen constantly, and oxygen in the blood and tissues makes up a large percentage of body mass.

Answer 1

The human body is mostly made up of water (H2O), and there is one oxygen atom in each molecule of water. Note that, although each water molecule also contains two hydrogen atoms, the atomic mass of hydrogen (about 1) is much smaller than the atomic mass of oxygen (about 16). Because of this, hydrogen contributes less to human body mass than oxygen

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Answer 2

The human body is mostly made up of water (H2O), and there is one oxygen atom in each molecule of water. Note that, although each water molecule also contains two hydrogen atoms, the atomic mass of hydrogen (about 1) is much smaller than the atomic mass of oxygen (about 16). Because of this, hydrogen contributes less to human body mass than oxygen.