b. The flask is removed from the hot water bath while liquid remains.c. The volume in the flask occupied by the stopper was not accounted for when the volumeof the flask was measured.4. What affect on the molar mass would occur if twice the experimental volume of volatileliquid was placed in the flask at the beginning of the experiment?5. Would this experiment be practical if the unknown had a boiling point of 130°C?85 Name Abubakar AliProblemsSection1. A 0.678 gram sample of gas occupies 0.214L at standard conditions; what is the molar massof the gas?2. A sample of gas occupies 250. mL at 37°C and 730. torr; what volume would the gas occupyat standard conditions?3. A 5.00 mL sample of an unknown liquid is vaporized in a flask having a volume of 285 mL.At 100°C, 0.4168 g of the vapor exerts a pressure of 740 torr. Calculate the gram molar massof the unknown liquid.4. Calculate the density of oxygen gas at 50°C and 750. torr.5. Calculate the density of H2S at STP.86

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1. A 0.678 gram sample of gas occupies 0.214 L at standard conditions; what is the molar mass of the gas?

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

b. The flask is removed from the hot water bath while liquid remains.
c. The volume in the flask occupied by the stopper was not accounted for when the volume
of the flask was measured.
4. What affect on the molar mass would occur if twice the experimental volume of volatile
liquid was placed in the flask at the beginning of the experiment?
5. Would this experiment be practical if the unknown had a boiling point of 130°C?
85

Name Abubakar Ali
Problems
Section
1. A 0.678 gram sample of gas occupies 0.214L at standard conditions; what is the molar mass
of the gas?
2. A sample of gas occupies 250. mL at 37°C and 730. torr; what volume would the gas occupy
at standard conditions?
3. A 5.00 mL sample of an unknown liquid is vaporized in a flask having a volume of 285 mL.
At 100°C, 0.4168 g of the vapor exerts a pressure of 740 torr. Calculate the gram molar mass
of the unknown liquid.
4. Calculate the density of oxygen gas at 50°C and 750. torr.
5. Calculate the density of H2S at STP.
86

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