Question
In a water molecule, the ratio of the mass of Hydrogen to the mass of Oxygen is always ________.
The correct answer is
1:8
1 mole of hydrogen = 1 gram
1 mole of oxygen = 16 grams
Water (H2O) = 2 hydrogen atoms + 1 oxygen atom
2 moles of hydrogen = 2 grams
1 mole of oxygen = 16 grams
The ratio of the mass of hydrogen to the mass of oxygen = 2/16 = 1/8
The ratio of the mass of hydrogen to the mass of oxygen is always 1: 8.
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