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: According to government standards, the 8-h threshold limit value is 5000 ppmv for CO2 and 0.1 ppmv for Br2 (1 ppmv is 1 part by volume in 10 6 parts by volume). Exposure to either gas for 8 h above th

Problem

According to government standards, the 8-h threshold limit value is 5000 ppmv for CO2 and 0.1 ppmv for Br2 (1 ppmv is 1 part by volume in 10 6 parts by volume). Exposure to either gas for 8 h above these limits is unsafe. At STP, which of the following would be unsafe for 8 h of exposure? 

(a) Air with a partial pressure of 0.2 torr of Br  
(b) Air with a partial pressure of 0.2 torr of CO
(c) 1000 L of air containing 0.0004 g of Br 2 gas
(d) 1000 L of air containing 2.8×1022 molecules of CO2