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23 Nov 2019

An empty Erlenmeyer flask weighs 246.3 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 495.0 g.(a) What is the flask's volume?(b) How much does the flask weigh when filled with chloroform (d = 1.48 g/cm3)?

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Bunny Greenfelder
Bunny GreenfelderLv2
31 Jul 2019

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Related questions

An empty vial weighs 48.98 g. If the vial weighs 187.07 g when filled with liquid mercury

(d = 13.53 g/cm3),

what volume of mercury is in the vial?

You weigh a dry flask, and place a chunk of solid into it, thenweigh it again.
You then fill the flask to the top with water and weigh the fullflask.
Finally, you take the solid out, fill the flask to the top withwater and weigh it once more


Density of water at 20 C = .9982
Density of water at 35 C = .9941


Mass of flask is 58.9901g
Mass of Flask plus the solid 121.8396g
Mass of water plus the solid and water 131.8305g
Mass of flask filled with water 82.2495g
Measured temperature of water 23.75C


Calculate the following:
1) Density of water at the measured temperature in (g/cc)
2) The mass of the solid in (g)
3) The volume of the flask in (cc)
4) The volume of the flask (not occupied b the solid) in (cc)
5) The volume of the solid in (cc)
6) Density of the solid unknown in (g/cc)

A certain volatile hydrocarbon (a binary compound of carbon and hydrogen) is found to be 92.3% carbon by mass. In a seperate experiment, utilizing the Dumas method, a 4.00 mL pure liquid sample of this hydrocarbon is vaporized in a 125 mL Florence flask when the barometric pressure is 768.0 torr. After the exess gas escapes the temperature is measures as 98.0 C. The flask and contents are subsequenlty cooled to 25 C (densitry water at 25 C = 0.997044 g/mL ) and the vapor condenses to a liquid. The flask is then empetied cleaned and filled with water. When weighed on the balance, the difference in weight between the flask filled to the brim with water and the dry empty flask at 25 C is 128.12 g

The empty flask - fitted with a foil cap pierced with a pinhole - weighs 25.3478g

The weight of the flask and contents is found to be 25.6803g

Determine the Emperical formula, the volume that the vapor occupied in the Florence flask and the molecular formula of this hydrocarbon.

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