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The cool thing about atomic masses listed on the Periodic Table is not only does it represent how many grams are in one mole of that element, but also how many amu (Atomic Mass unit)s one atom weighs. So, you can just add 2H + O = (2*1.00794) + (15.9994) = 18.0153 g/mol = 18.01528 amu. Then, you can use the conversion factor 1 amu = 1.66053886*10-24 grams to find the mass of one molecule: 2.99151058*10-23 grams.

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Q: How much mass would be in a water molecule?
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Related questions

How much ocean water is in a molecule?

A molecule of water has a mass of 18 amu.


How much mass does a water molecule have?

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How much does one water molecule weight?

The mass of any molecule is equal to the sum of the Atomic Mass Units of all of its constituent atoms. Atomic Mass Unit values may be found on any Periodic Table. In this case, a water molecule consists of two Hydrogen atoms and one Oxygen atom. Hydrogen has a mass of approximately 1 AMU. Oxygen has a mass of approximately 16 AMU. Therefore, the mass of one molecule of water is approximately 18 AMU (or 18.01528 AMU exactly). What does this number mean? If you had exactly 6.022 x 10^23 molecules of water, it would weigh 18 grams.


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If a quarter of the mass of the molecule is iron and the mass of the molecule is 89600u, then the mass of iron is 22400u ... a quarter of the total mass.


What does the mass per element tell you about a molecule?

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How much mass would one molecule of water have?

The mass of any molecule is equal to the sum of the Atomic Mass Units of all of its constituent atoms. Atomic Mass Unit values may be found on any Periodic Table. In this case, a water molecule consists of two Hydrogen atoms and one Oxygen atom. Hydrogen has a mass of approximately 1 AMU. Oxygen has a mass of approximately 16 AMU. Therefore, the mass of one molecule of water is approximately 18 AMU (or 18.01528 AMU exactly). What does this number mean? If you had exactly 6.022 x 10^23 molecules of water, it would weigh 18 grams.