Core - Chemistry

Chapter 1

Introduction: Matter and Measurement

1.1 : Scientific Laws and Theories

1.1 : Scientific Laws and Theories

Scientific Laws In science, a law is defined as a concise, verbal or mathematical, statement that summarizes a vast number of experimental observations. ...

1.2 : The Scientific Method

1.2 : The Scientific Method

Chemistry is an empirical science. Scientists often pose questions to understand the chemistry in everyday life and seek answers to these questions. To ...

1.3 : Classifying Matter by State

1.3 : Classifying Matter by State

Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, ...

1.4 : Classifying Matter by Composition

1.4 : Classifying Matter by Composition

Matter: Pure Substances and Mixtures According to its composition, the matter can be classified into two broad categories — pure substances and ...

1.5 : Physical and Chemical Properties of Matter

1.5 : Physical and Chemical Properties of Matter

The characteristics that enable us to distinguish one substance from another are called properties. Physical Properties of Matter A physical property is ...

1.6 : What is Energy?

1.6 : What is Energy?

The universe is composed of matter in different forms, and all forms of matter contain energy. The different forms of energy on Earth originate from ...

1.7 : Measurement: Standard Units

1.7 : Measurement: Standard Units

Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement ...

1.8 : Measurement: Derived Units

1.8 : Measurement: Derived Units

The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, ...

1.9 : Uncertainty in Measurement: Accuracy and Precision

1.9 : Uncertainty in Measurement: Accuracy and Precision

Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy ...

1.10 : Uncertainty in Measurement: Reading Instruments

1.10 : Uncertainty in Measurement: Reading Instruments

Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such ...

1.11 : Uncertainty in Measurement: Significant Figures

1.11 : Uncertainty in Measurement: Significant Figures

All the digits in a measurement, including the uncertain last digit, are called significant figures or significant digits. Note that zero may be a ...

1.12 : Dimensional Analysis

1.12 : Dimensional Analysis

Dimensional analysis, also known as the factor label method, is a versatile approach for mathematical operations. The main principle behind this approach ...

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