Chem Quiz Chapter 3
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each of the black spaces below before clicking
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| WHAT IS MATTER? | anything that has mass or takes up space
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| ORGANIZATION OF MATTER | mixtures and pure substances
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| ORGANIZATION OF MIXTURES | heterogeneous and homogeneous mixtures
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| ORGANIZATION OF SUBSTANCES | elements and compounds
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| WHAT IS THE DIFFERENCE BETWEEN A GAS AND A VAPOR? | Gases are gases at room temp.
Vapor is a solid or liquid at room temp.
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| WHAT ARE PHYSICAL PROPERTIES? | properties that can be measured or observed without creating a new substance
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| WHAT ARE INTENSIVE AND EXTENSIVE PROPERTIES? | -intensive: independent to amount of substance (density, spices)
-extensive: dependent to amount of substance (mass, volume)
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| WHAT ARE CHEMICAL PROPERTIES? | characteristics that can be measured or observed only by trying to create a new substance
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| WHAT IS A PHYSICAL CHANGE? | -a change that affects one or more of the physical properties
-can alter substance without changing its properties
-includes a phase change
(boiling, condensing, melting, freezing, ripping)
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| WHAT IS A CHEMICAL CHANGE? | -new substances are formed with new properties
-atoms in molecules are rearranged
-old bonds break, new bonds form
(burning, decomp, rusting, exploding, oxidizing)
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| WHAT IS THE LAW OF CONSERVATION OF MASS? | in any reaction, mass is neither created nor destroyed
(mass of reactants = mass of products)
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| LIST INDICATORS OF A CHEMICAL CHANGE. | -color change
-production of bubbles
-change in temperature
-formation of a solid (mixing 2 liquids)
-production of light, sound, or smell
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| WHAT IS A MIXTURE? | -physical blend of two or more things
-can be separated physically
-each substance retains individual properties
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| WHAT ARE SOME WAYS TO SEPARATE MIXTURES? | -physical sort
-distillation
-filtration
-crystallization
-sublimation
-chromatography
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| WHAT ARE PURE SUBSTANCES? | -substances that have a definite composition and are uniform
-pure and homogeneous
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| WHAT ARE TWO TYPES OF PURE SUBSTANCES? | -elements
-compounds
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| WHAT IS AN ELEMENT? | -simplest substances which retain
-building blocks to other compounds
-metals, non-metals, carbon, sulfur, etc.
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| WHAT IS A COMPOUND? | -a combination of two or more elements
-can only be separated chemically
-properties are different than that of compound elements
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| HETEROGENEOUS MIXTURE: | -a mixture without uniform composition
-individual substances are distinct
-don't blend entirely
-soup; concrete
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| HOMOGENEOUS MIXTURE: | -mixture that has uniform composition
-all substances mix so that no substances are distinct
-called a solution
-tap water; air
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