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12 Cards in this Set
- Front
- Back
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What do chemical equations represent?
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chemical reactions
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Are the chemical formulas on the left of the arrow in a chemical equation reactants or products?
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reactants
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Are the chemical formulas on the right of the arrow in a chemical equation reactants or products?
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products
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True or False: Atoms can be created or destroyed in any reaction.
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False.
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True or False: A chemical equation must have an equal number of atoms of each element on each side of the arrow.
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true
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True or False: subscripts may be changed when balancing chemical equations.
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False. Changing a subscript would be changing its identity.
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True or False: Placing a coefficient in front of a formula changes the identity of the substance.
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False. placing a coefficient in front of a formula only changes the amount, not the identity
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Is A + B --> C
a combination reaction or decomposition reaction? |
combination reaction
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Is C --> A + B
a combination reaction or a decomposition reaction? |
decomposition reaction
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What is a combination reaction?
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2 or more substances react to form one product.
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When a combination reaction occurs between a metal and a nonmetal, what is the product?
Ex: 2mg(s) + O2(g) --> |
an ionic solid.
EX: --> 2mgO(s) |
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What is a decomposition reaction?
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a single reactant breaks apart to form 2 or more substances.
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