DAT DESTROYER Gen. Chem. #23

[Denizen]

One molecule of a compound has a mass of 2.0 * 10^-22 grams. What is its molecular mass?


Molecular mass? According to Google, that's the mass of a molecule, so I'm confused here. Shouldn't the answer be 2.0 * 10^-22 grams?


The correct answer is (2.0 * 10^-22)(6.02 * 10^23) grams/mole. Is this a typo or something? Did he mean molar mass in the original question?

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[Dre4m3r]

Molecular mass = molar mass= grams/moles

 

[Denizen]

Thanks, Dr. Jim. So, is the wikipedia article wrong? https://en.wikipedia.org/wiki/Molecular_mass
I'm not incredibly concerned over it, just curious.

 

[DAT Destroyer]

One molecule of a compound has a mass of 2.0 * 10^-22 grams. What is its molecular mass?


Molecular mass? According to Google, that's the mass of a molecule, so I'm confused here. Shouldn't the answer be 2.0 * 10^-22 grams?


The correct answer is (2.0 * 10^-22)(6.02 * 10^23) grams/mole. Is this a typo or something? Did he mean molar mass in the original question?

NO......In Chemistry parlance, molecular mass, molecular weight, molar mass is all expressed in grams/mole. For more clarity consult a standard text such a Zumdahl or Raymond Chang.

Dr. Romano

 

[Denizen]

Thanks again for clearing that up. I figured it had to do with chemistry jargon, but I just wanted to make sure I covered all my bases.

 

[DAT Destroyer]

Thanks again for clearing that up. I figured it had to do with chemistry jargon, but I just wanted to make sure I covered all my bases.

Always happy to help!