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Characteristics of Chemical Reactions Flashcards | StudBud
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Characteristics of Chemical Reactions
Characteristics of Chemical Reactions
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Review for Characteristics of Chemical Reactions test
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1
Which of the following is the best description of the results of a chemical reaction?
substance changes from liquid to solid at a low temperature.
reaction can be reversed to get back the original substance.
The substance seems to disappear after dissolving in water.
A new substance with different properties is formed.
2
During the lab in class, what were the 4 indicators of a chemical reaction that were observed?
Changes in color/temperature, formation of gas/precipitate
Changes in volume & mass, formation of gas or precipitate
Changes in mass & density, formation of gas or precipitate
Changes in color & temperature, change in volume and mass
3
Has mass and takes up space; matter occurs as elements, compounds, and mixtures.
Solubility
Pure substance
Density
Matter
4
Resources that exist in the environment without human intervention.
Natural Resources
Solubility
Synthetic Material
Density
5
Measurement of the ability of a solid to dissolve in a liquid.
Pure substance
Density
Solubility
Matter
6
Large quantities.
Physical Property
Pure Substance
Bulk quantities
Chemical Property
7
Method or means of somehow changing one or more chemicals or chemical compounds
Chemical Process
Molecule
Reactant
Atom
8
C and O react to form carbon dioxide. How do we know that a chemical reaction has occurred?
The carbon and oxygen atoms regroup into a new molecule
Carbon molecules are negative, and oxygen positive.
Carbon molecules are negative, and oxygen positive.
Carbon atoms are much larger than hydrogen atoms.
9
Materials made by humans.
Solubility
Synthetic Materials
Pure Substance
Density
10
Simplest unit of chemical compound that exist, formed when 2 or more atoms join chemically.
Reactant
Molecule
Chemical process
Atom
11
The way that substances react and change with other substances.
Matter
Physical Property
Chemical Property
Density
12
Name the solution used to dissolve all of the substances in the chemistry investigation lab?
Apple juice
Grape juice
Cabbage juice
Carrot juice
13
A substance that takes part in and undergoes change during a reaction.
Product
Properties
Reactant
Atom
14
the best evidence that this reaction follows the law of conservation of mass?
The # of molecules after the reaction changes from 3 to 2.
All of elements present before reaction are present after
same number/type of each atom on both sides of the equation.
More chlorine and hydrogen atoms are made
15
The process by which one or more substances change to produce one or more different substances
Chemical Reaction
Physical Property
Matter
Chemical Property
16
The amount of matter in a given space or volume; it is a relationship between mass and volume.
Solubility
Density
Mass
Volume
17
Physical and chemical characteristics of matter used to describe or identify a substance
Properties
Molecule
Chemical Process
Reactant
18
Characteristic that is observed or measured without changing the substance: color, melting pt.
Pure Substance
Synthetic materials
Chemical Property
Physical Property
19
A single substance, either an element or a compound, with definite composition and properties.
Bulk quantity
Solubility
Pure Substance
Matter
20
The smallest particle of an element maintaining the chemical identity of that element
Atom
Reactant
Properties
Molecule
