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What is one mole of H2O composed of?
A. 2 hydrogen atoms and 1 oxygen atom
B. 2 × (6.02 × 1023) hydrogen atoms and 6.02 ×1023 oxygen atoms
C. 3 atoms of water and 2 oxygen molecules
D. one half of a molecule of peroxide

I say A

  • math -

    a mole is 6.02*10^23 molecules.

    A is one molecule
    B is one mole

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