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1. Chemical Measurements(0)

SI Units
(0)

Metric Prefixes
(0)

Chemical Concentrations
(0)

Volumetric Analysis
(0)

Volumetric Titrations
(0)

2. Tools of the Trade(0)

Safety & Labels
(0)

Buoyancy
(0)

Thermal Dependency
(0)

Volumetric Instruments
(0)

Filtration & Evaporation
(0)

3. Experimental Error(0)

Significant Figures
(0)

Addition and Subtraction Operations
(0)

Multiplication and Division Operations
(0)

Logarithm and Anti-Logarithm Operations
(0)

Precision and Accuracy
(0)

Types of Errors
(0)

Uncertainty
(0)

4 & 5. Statistics, Quality Assurance and Calibration Methods(0)

Mean Evaluation
(0)

The Gaussian Distribution
(0)

Confidence Intervals
(0)

Hypothesis Testing (t-Test)
(0)

Analysis of Variance (f-Test)
(0)

Detection of Gross Errors
(0)

6. Chemical Equilibrium(0)

The Equilibrium State
(0)

The Reaction Quotient
(0)

Le Chatelier's Principle
(0)

Chemical Thermodynamics: Enthalpy
(0)

Chemical Thermodynamics: Entropy
(0)

Chemical Thermodynamics: Gibbs Free Energy
(0)

Solubilty Product Constant
(0)

Protic Acids and Bases
(0)

The pH Scale
(0)

Acid Strength
(0)

7. Activity and the Systematic Treatment of Equilibrium(0)

Ionic Strength of Soluble Salts
(0)

Activity Coefficients
(0)

pH Revisited
(0)

8. Monoprotic Acid-Base Equilibria(0)

Arrhenius Acids and Bases
(0)

Bronsted-Lowry Acids and Bases
(0)

Lewis Acids and Bases
(0)

Auto-Ionization
(0)

Ka and Kb of compounds
(0)

Weak Acid-Base Equilibria
(0)

Ionic Salts of Weak Acids and Bases
(0)

Buffers
(0)

9. Polyprotic Acid-Base Equilibria(0)

Diprotic Acids and Bases
(0)

Polyprotic Acids and Bases
(0)

Diprotic Buffers
(0)

Polyprotic Buffers
(0)

Principal Species
(0)

Isoelectric and Isoionic pH
(0)

10. Acid-Base Titrations(0)

Strong Acid-Strong Base Titrations
(0)

Weak Acid-Strong Base Titrations
(0)

Weak Base-Strong Acid Titrations
(0)

Diprotic Acid Titrations
(0)

Polyprotic Titrations
(0)

11. EDTA Titrations(0)

Metal Chelate Complexes
(0)

EDTA
(0)

EDTA Titration Curves
(0)

12. Advanced Topics in Equilibrium(0)

General Approach to Acid-Base Systems
(0)

Fractional Compositions and Concentrations
(0)

Dependence of Solubility on pH
(0)

13. Fundamentals of Electrochemistry(0)

Basic Concepts
(0)

Electrochemical Cells
(0)

Standard Potentials
(0)

Nernst Equation
(0)

Standard Cell Potential & the Equilibrium Constant
(0)

14. Electrodes and Potentiometry(0)

Potentiometry
(0)

Reference Electrodes
(0)

Junction Potential
(0)

Glass Electrodes and pH Measurements
(0)

15. Redox Titrations(0)

Titrations and Titration Curves
(0)

The End Point
(0)

Analyte Oxidation State
(0)

Oxidizing Agents
(0)

16. Electroanalytical Techniques(0)

Fundamentals of Electrolysis
(0)

Gravimetric Analysis
(0)

Coulometry
(0)

Voltammetry
(0)

17. Fundamentals of Spectrophotometry(0)

Properties of Light
(0)

Absorption of Light
(0)

Measuring Absorbance
(0)

Beer's Law
(0)

Instrument Components
(0)

3. Experimental Error

Addition and Subtraction Operations

3. Experimental Error

Addition and Subtraction Operations: Videos & Practice Problems

Video Lessons Practice Worksheet

Addition and Subtraction Operations Practice Problems

16 problems

Problem 1Multiple Choice

What is the primary requirement for adding or subtracting numbers in scientific notation?

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Problem 2Multiple Choice

When adding 3.2 x 10⁵ and 4.5 x 10⁵, what is the correct process?

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Problem 3Multiple Choice

Calculate (5.6 x 10³) + (3.4 x 10³) without using a calculator.

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Problem 4Multiple Choice

What is the result of (6.78 x 10²) - (2.3 x 10²) with the correct number of decimal places?

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Problem 5Multiple Choice

Combine 1.234 x 10³ and 5.67 x 10² by adjusting decimal places.

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Problem 6Multiple Choice

Why is it important to manually adjust exponents when adding or subtracting in scientific notation without a calculator?

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Problem 7Multiple Choice

In the example of adding 4.5 x 10⁶ and 3.2 x 10⁵, what is the first step?

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Problem 8Multiple Choice

Solve (7.89 x 10⁴) - (2.34 x 10³) by first adjusting the exponents.

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Problem 9Multiple Choice

Combine 7.89 x 10² and 1.23 x 10³ by adjusting decimal places.

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Problem 10Multiple Choice

What must be true about the exponents when subtracting numbers in scientific notation?

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Problem 11Multiple Choice

What happens to the coefficients when adding 2.5 x 10⁷ and 3.5 x 10⁷?

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Problem 12Multiple Choice

Calculate (8.4 x 10⁵) - (2.1 x 10⁵) without using a calculator.

Problem 13Multiple Choice

How would you transform 6.0 x 10² and 4.0 x 10³ to have the same exponent for addition?

Problem 14Multiple Choice

Combine 2.345 x 10³ and 6.789 x 10² by adjusting decimal places.

Problem 15Multiple Choice

What is a key consideration when manually adding numbers in scientific notation?

Problem 16Multiple Choice

In the example of subtracting 5.0 x 10⁸ from 7.0 x 10⁸, what is the first step?

Significant Figures Practice Problems Multiplication and Division Operations Practice Problems

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