All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Which of the gases in the graph below has the largest molar mass?A) AB) BC) CD) DE) There is not enough information to determine.

Solution: Which of the gases in the graph below has the largest molar mass?A) AB) BC) CD) DE) There is not enough information to determine.

Problem

Which of the gases in the graph below has the largest molar mass?

A) A

B) B

C) C

D) D

E) There is not enough information to determine.

Solution

We’re being asked which gas has the largest molar mass at 25 ˚C.


In the graph, the y-axis is the relative number of particles while the x-axis is the molecular speed. We can think of the molar mass of a gas as being related to the number of particles ( molar mass =  particles).


Recall that the molecular speed of a gas is given by:



where R = gas constant, T = temperature, and M = molar mass of the gas.


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