
Determine the mole fraction of helium in a gaseous mixture consisting of 0.524 g He,
(a)
0.0069
(b)
0.0259
(c)
0.481
(d)
0.493
(e)
0.131

Interpretation:
The mole fraction of helium in a gaseous mixture is to be calculated.
Concept introduction:
The mole fraction of an individual gas, for a combination of gases, is the ratio of the moles of the individual gas to the total number of moles of the mixture.
Here,
Also, the mole fraction of an individual gas, for a combination of gases, can be calculated from the ratio of the partial pressure of the individual gas to the total pressure of the combination.
Here,
The number of moles can be calculated as
Here, m represents the mass of the molecule, M represents the molar mass of the molecule, and
Answer to Problem 1KSP
Solution: Option (d).
Explanation of Solution
Given information:
Mass of helium
Mass of argon
Mass of methane
Reason for the correct option:
The molar mass of helium is
Calculate the number of moles of helium as follows:
Substitute
The molar mass of argon is
Calculate the number of moles of argon as follows:
Substitute
The molar mass of methane is
Calculate the number of moles of methane as follows:
Substitute
From Dalton’s law for the combination of gases, the total number of moles can be calculated as
Substitute
Calculate the mole fraction for
Substitute
Thus, for
Hence, option (d) is correct.
Reason for the incorrect options:
Option (a) is incorrect because the calculated value of mole fraction of heliumfor the given gaseous mixturedoes not match the given value in option (a).
Option (b) is incorrect because the calculated value of mole fraction of helium for the given gaseous mixturedoes not match the given value in option (b).
Option (c) is incorrect because the calculated value of mole fraction of helium for the given gaseous mixturedoes not match the given value in option (c).
Option (e) is incorrect because the calculated value of mole fraction of helium for the given gaseous mixturedoes not match the given value in option (e).
Hence, options(a), (b), (c), and (e) are incorrect.
Want to see more full solutions like this?
Chapter 10 Solutions
Chemistry
- How does the square root mean square velocity of gas molecules vary with temperature? Illustrate this relationship by plotting the square root mean square velocity of N2 molecules as a function of temperature from T=100 K to T=300 K.arrow_forwardDraw product B, indicating what type of reaction occurs. F3C CF3 NH2 Me O .N. + B OMearrow_forwardBenzimidazole E. State its formula. sState the differences in the formula with other benzimidazoles.arrow_forward
- Draw product A, indicating what type of reaction occurs. F3C CN CF3 K2CO3, DMSO, H₂O2 Aarrow_forward19) Which metal is most commonly used in galvanization to protect steel structures from oxidation? Lead a. b. Tin C. Nickel d. Zinc 20) The following molecule is an example of a: R₁ R2- -N-R3 a. Secondary amine b. Secondary amide c. Tertiary amine d. Tertiary amidearrow_forwardpls helparrow_forward
- pls helparrow_forward35) Complete the following equation by drawing the line the structure of the products that are formed. Please note that in some cases more than one product is possible. You must draw all possible products to recive full marks! a. ethanol + 2-propanol + H2SO4 → b. OH conc. H2SO4 CH2 H3C CH + K2Cr2O7 C. d. H3C A pressure CH3 + H2 CH Pt catalystarrow_forward21) The rate of reaction depends upon: a. the concentration and nature of reactants b. the temperature of the reaction C. whether or not a catalyst was used d. all of the above 22) A Maxwell-Boltzmann curve shows the distribution of molecular energies in a reaction system. When the temperature in this system is increased, the peak is a. higher and further to the right. b. higher and further to the left. c. lower and further to the right. d. lower and further to the left. 23) Which of the following correctly describes the reaction represented by the reaction below? CaCO3 (s) + energy → CaO (s) + CO2 (g) a. It is exothermic and the potential energy is greater in the reactants than the products. b. c. It is exothermic and the potential energy is greater in the products than the reactants. It is endothermic and the potential energy is greater in the products than the reactants. d. It is endothermic and the potential energy is equal for the products and reactants.arrow_forward
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co




