CHM2045 Chapter 1 - Molecules: the smallest unit that...

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Chapter 1 – Matter and Measurement State: whether a substance is a solid, liquid, or gas. (Gases are always subject to more change with a change in temperature and pressure change) Kinetic-Molecular theory: all matter consists of extremely tiny particles (atoms, molecules, or ions) Heterogeneous: uneven textures of the material can be detected Homogeneous: consists of two or more substances in the same phase. (homogenous mixtures are also referred to as solutions) An atom is the smallest particle of an element that retains the characteristic chemical properties of that element. A pure substance which is composed of two or more different elements, held together by a chemical bond, is referred to as a: chemical compound. Ions: electrically charged atoms or groups of atoms.
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Unformatted text preview: Molecules: the smallest unit that retains the composition and chemical characteristics of the compound. Extensive Properties: depend on the amount of a substance present (the mass/volume of elements) Intensive Properties: Do not depend on the amount of a substance (melting point, density etc) A chemical change involves a change in the identity of a substance. **memorize how to convert from Celsius to Fahrenheit** The SI unit for volume is a (Liter) **** 1 liter=1000 mL=1000 cm 3 **** **** 1 cm 3 = .001L= 1mL **** Percent Error = error in measurement/accepted value >Write in: (What you got) (the accepted value) / (the accepted value) Study significant pictures on page 39....
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CHM2045 Chapter 1 - Molecules: the smallest unit that...

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