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Which elements make up the pain reliever acetaminophen, chemical formula C8H9O2N? Of these elements, which is present in the greatest proportion by number of atoms?


a

Calcium, helium, ozone, and neon, with calcium present in the greatest proportion

b

Carbon, hydrogen, oxygen, and nitrogen, with carbon present in the greatest proportion

c

Calcium, hydrogen, oxygen, and neon, with hydrogen present in the greatest proportion

d

Carbon, hydrogen, oxygen, and nitrogen, with hydrogen present in the greatest proportion

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Answer:

Carbon, hydrogen, oxygen, and nitrogen, with hydrogen present in the greatest proportion

Explanation:

Let's consider the chemical formula of acetaminophen: C₈H₉O₂N. According to this formula, in 1 molecule of acetaminophen there are:

  • 8 atoms of carbon (C)
  • 9 atoms of hydrogen (H)
  • 2 atoms of oxygen (O)
  • 1 atom of nitrogen (N)

As we can see, the element present in the greatest proportion by number of atoms is hydrogen.