Small question about molar concentrations.

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SUMMARY

The discussion clarifies that a molar concentration of 0.5 parts per million (ppm) does not equate to 0.5 moles in a million. Instead, 0.5 ppm indicates that there are 0.5 grams of solute per one million grams of solution. This distinction is crucial for accurate calculations in thermodynamics and chemistry.

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seang
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Hello, on one of my thermo problems, it says, "a molar concentration of .5 parts per million." what does this mean? .5 moles in a million?
 
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No. 0.5 ppm concentration.
 

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