A molecule of water is composed of two atoms of hydrogen andone atom of oxygen (

Question

A molecule of water is composed of two atoms of hydrogen andone atom of oxygen (H20). If the atomic mass number ofhydrogen is 1 and the molecular mass of water is 18, the atomicmass of oxyen must be (a)36                  (c) 18 (b)16                   (d)14 A molecule of water is composed of two atoms of hydrogen andone atom of oxygen (H20). If the atomic mass number ofhydrogen is 1 and the molecular mass of water is 18, the atomicmass of oxyen must be (a)36                  (c) 18 (b)16                   (d)14

Explanation / Answer

B. 18 [water] - 2(1) [hydrogens] = 16 [oxygen]

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