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: 1.560 x 10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 98.8 s.Under identical conditions, 1.749 x 10-4 mol of argon gas takes 84.9 s to effuse. What is the molar mass of

Problem

1.560 x 10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 98.8 s.

Under identical conditions, 1.749 x 10-4 mol of argon gas takes 84.9 s to effuse. 

What is the molar mass of the unidentified substance (in g/mol)? 

The percentage C by mass in the above unidentified substance is 53.0%. It may also contain H and/or O, but no other element. 

What is the molecular formula of the substance? 

In typing this formula use the convention of C first, H second and O last. For example, C6H8O2 would be C6H802.) 

Under identical conditions, how many moles of acetylene (C2H2) gas would effuse in 86.5 s?