Chemical Reactions: Question Preview (ID: 22937)

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The number in front of a chemical formula that tells how many molecules are in a chemical reaction is a
a) coefficient b) subscript c) superscript d) prime factor
Conservation of mass in chemistry tells us
a) Mass should never be wasted. b) Matter is not created or destroyed during a chemical reaction. c) Conserve resources when experimenting d) Matter can be created, but not destroyed.
The materials you end up with in a chemical reaction are the
a) products b) reactants c) solvents d) coefficients
The materials you start with in a chemical reaction are called the
a) reactants b) products c) chemical formulas d) coefficients
If an elemental symbol does not have a subscript, you assume that the number is
a) 1 b) 0 c) 2 d) an error
The small number that is lower and to the right of the element symbol is called the
a) subscript b) coefficient c) superscript d) formula
What kind of chemical reaction puts things together?
a) synthesis b) decomposition c) replacement d) combustion
What kind of chemical reaction has one element replacing another element?
a) replacement b) synthesis c) decomposition d) double replacement
What type of chemical reaction breaks things down?
a) decomposition b) synthesis c) replacement d) double replacement
Symbols showing a chemical reaction is a
a) chemical equation b) chemical formula c) chemical symbol d) chemical hazard
In the chemical formula: 2CO , the 2 is called the
a) coefficient b) subscript c) superscript d) symbol
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