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molecular mass of liquid when vaporized?
Calculate the molecular mass of a liquid that when vaporized at 91°C and 740 Torr gave 140 mL of vapor with a mass of 0.775 g.
2 Answers
- rb42redsunsLv 61 decade agoFavorite Answer
Start with the ideal gas law, then substitute mass/molecular weight for the number of moles. Solve for MW.
MW = (mRT)/(PV)
Make sure all of your units cancel correctly.
- Anonymous5 years ago
So, you didn't take my advice as to including all that extraneous information. I guess that means you're smarter than I am. Use PV = nRT to calculate moles. molar mass is grams / mole
