Core - Chemistry

    Chapter 1

    Introduction: Matter and Measurement

    1.1 : Scientific Laws and Theories02:31

    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. ...

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    1.2 : The Scientific Method03:50

    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 ...

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    1.3 : Classifying Matter by State02:49

    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, ...

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    1.4 : Classifying Matter by Composition03:35

    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 ...

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    1.5 : Physical and Chemical Properties of Matter02:57

    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 ...

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    1.6 : What is Energy?04:10

    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 ...

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    1.7 : Measurement: Standard Units03:38

    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 ...

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    1.8 : Measurement: Derived Units03:02

    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, ...

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    1.9 : Uncertainty in Measurement: Accuracy and Precision03:37

    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 ...

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    1.10 : Uncertainty in Measurement: Reading Instruments02:46

    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 ...

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    1.11 : Uncertainty in Measurement: Significant Figures03:34

    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 ...

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    1.12 : Dimensional Analysis03:40

    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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