What is the mass of a single molecule of water?
Understand the Problem
The question is asking for the mass of a single water molecule, which can be found by calculating the molecular weight of water (H2O) and then converting it to mass per molecule using Avogadro's number.
Answer
Approximately 2.9915 × 10^-23 grams or 18.015 amu.
The final answer is approximately 2.9915 × 10^-23 grams or 18.015 amu.
Answer for screen readers
The final answer is approximately 2.9915 × 10^-23 grams or 18.015 amu.
More Information
Water molecules are composed of two hydrogen atoms and one oxygen atom. The mass calculated in grams involves dividing the molar mass of water by Avogadro's number.
Tips
Common mistakes include forgetting to use Avogadro's number to convert from molar mass to the mass of a single molecule and confusing the unit conversions between grams and atomic mass units.
Sources
- Calculate the Mass in Grams of a Single Water Molecule - sciencenotes.org
- The mass of one molecule of water is approximately: 1 g 0.5 g 1.66 ... - toppr.com
- How to Find the Mass of One Molecule of Water (H2O) - YouTube - youtube.com
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