Ch.1 - Intro to General ChemistryWorksheetSee 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: Carry out the following calculations, expressing each result with the correct number of significant figures:24.567 g + 0.044 78 g = ? g

Problem

Carry out the following calculations, expressing each result with the correct number of significant figures:

24.567 g + 0.044 78 g = ? g

Solution

We are asked to carry out the following calculations, expressing each result with the correct number of significant figures:

24.567 g + 0.044 78 g = ? g


Recall: For addition and subtraction, look at the decimal portion (i.e., to the right of the decimal point) of the numbers ONLY. 

Here is what to do:

  1. Count the number of significant figures in the decimal portion of each number in the problem. (The digits to the left of the decimal place are not used to determine the number of decimal places in the final answer.) 
  2. Add or subtract in the normal fashion. 
  3. Round the answer to the LEAST number of places in the decimal portion of any number in the problem.
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