Ch.2 - Atoms & ElementsWorksheetSee 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: Which quantity or quantities must always be the same on both sides of a chemical equation? Check all that apply.a. the number of molecules of each kindb. the sum of the masses of all substances involv

Solution: Which quantity or quantities must always be the same on both sides of a chemical equation? Check all that apply.a. the number of molecules of each kindb. the sum of the masses of all substances involv

Problem

Which quantity or quantities must always be the same on both sides of a chemical equation? Check all that apply.

a. the number of molecules of each kind

b. the sum of the masses of all substances involved

c. the number of moles of each kind of molecule

d. the number of atoms of each kind

Solution
  • For this problem, let's use this hypothetical equation as a guide: 2A + B→ 2AB

  • Analyzing the choices:

  • a. the number of molecules of each kind (False since we are forming a different kind of molecule in the product side compared to the reactant)

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