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What is a chemical reaction?
A chemical reaction is the process by which one or more substances change to produce one or more different substances.
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What are four signs that determine that a chemical reaction has taken place?
Four signs that determine that a chemical reaction has taken place is gas formation, solid formation, energy change, and color change. A gas formation is when gas forms from a reaction of two or more elements. Solid formation is when a solid forms and changes its matter. Energy change is when energy is released. Lastly, color change is when an element or object changes its color.
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What is a precipitate?
A precipitate is a solid that is produced as a result of a chemical reaction in a solution. An example is a cake.
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What is a chemical bond?
A chemical bond is a force that holds two atoms together in a molecule.
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A chemical ______ describes a chemical reaction.
equation
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The substances formed from a chemical reaction are ______.
products
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How does a balanced chemical equation illustrate that mass is never lost or gained in a chemical reaction?
A balanced equation illustrates the law of conservation of mass: mass is neither created nor destroyed during ordinary physical and chemical changes.
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What is the difference between a subscript and a coefficient?
The difference between a subscript and a coefficient is that a subscript can only apply to one element while a coefficient can apply to one or more elements. Also, a coefficient is placed in front of a chemical symbol or formula, while a subscript is a number written to the right and below of a chemical symbol.
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How can you balance a chemical equation?
You can balance a chemical equation by adding coefficient.
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What do the prefixes mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octa-, nona-, deca- mean?
Mono- 1, di- 2, tri- 3, tetra- 4, penta- 5, hexa- 6, hepta- 7, octa- 8, nona- 9, deca- 10.
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What are the four chemical reactions? What happens during each?
The four chemical reactions are synthesis, decomposition, single-displacement, and double-displacement. A synthesis reaction is a reaction when two or more elements combine and form a new compound. Decomposition reaction is when a compound breaks down and forms two or more elements. Single-displacement reaction is when one element takes the place of another element in a compound. A double-displacement reaction is when two reactants exchange ions to form two new compounds .
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What causes chemical bonds in molecules to break?
A lot of energy is what causes chemical bonds in molecules to break. If there is enough energy, when molecules bump into each other, the chemical bonds in the molecules break.
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How do substances form a chemical reaction?
New substances form in a chemical bond by first breaking chemical bonds in the starting substances, which takes energy. The atoms then rearrange and new bonds form to make new substances.
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What is an ion?
An ion is a charged particle that forms when an atom or group of atoms gains or loses one or more electrons.
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What is the charge of an ionic compound?
The charge of an ionic compound is neutral. It is neutral because it is a bond of ions and since ions are both negative and positive charged the charges cancel eachother out to make the compound neutral.
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What is an example of chlorophyll?
An example of chlorophyll is a leaf.
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