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: The effect of molar mass on molecular speed at 25 oC.Which of these gases has the largest molar mass?

Problem

A graph has molecular speed in meters per second on the x-axis, ranging from 5 times 10 square to 35 times 10 square. The y-axis is fraction of molecules, unscaled. Curves are plotted for O2, N2, H2O, Helium and H2. The curve for O2 rises sharply to a steep peak, the highest of any gas, at about 3 times 10 square meters per second, before decreasing to near zero by 10 times 10 square. The curve for N2 is similar to O2, but rises to a lower peak and is shifted very slightly right. The curve for H2O is broader, lower, and again shifted slightly right. The curve for Helium is much lower and broader still, rising to a peak only about one third the height of the O2 peak at around 10 times 10 square meters per second, declining slowly to near 0 by about 25 times 10 square meters per second. The curve for H2 is even lower and broader, peaking around 20 times 10 superscript 2 meters per second, and declining to near 0 around 35 times 10 squared meters per second.
The effect of molar mass on molecular speed at 25 oC.

Which of these gases has the largest molar mass?