Question

write the absolute molecular weight of h20

Answer 1

The molar mass is the total of all atomic weights of atoms in a molecule, expressed as grams. Hence water has 2 hydrogen atoms and one oxygen atom. The atomic weight of hydrogen is 1.00797 and for oxygen the atomic weight is 15.9994. So the molar mass of H2O is 15.9994 + (2 x 1.00797) which equals 18.01534 grams/mole.

Answer 2

Answer:

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The average mass of one H2O molecule is 18.02 amu.

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