Ch.3 - Chemical ReactionsWorksheetSee all chapters
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: Zinc (II) sulfide reacts with oxygen according to the reaction: 2 ZnS (s) + 3 O 2 (g)      →       2 ZnO (s) + 2 SO 2 (g) A reaction mixture initially contains 4.2 mol ZnS and 6.8 mol O 2. Once the reaction has occurred as completely as possible, what amount (in grams) of the excess reactant is left?  A. 5.28 g ZnS B. 7.04 g O2 C. 14.08 g O2 D. 15.84 g O2

Problem

Zinc (II) sulfide reacts with oxygen according to the reaction:

2 ZnS (s) + 3 O 2 (g)      →       2 ZnO (s) + 2 SO 2 (g)

A reaction mixture initially contains 4.2 mol ZnS and 6.8 mol O 2. Once the reaction has occurred as completely as possible, what amount (in grams) of the excess reactant is left? 

A. 5.28 g ZnS

B. 7.04 g O2

C. 14.08 g O2

D. 15.84 g O2