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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