Chemical Reactions Question Preview (ID: 169)
Identify These Reaction Types.
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This type of reaction always includes a diatomic oxygen molecule.
a) combustion
b) single replacement
c) double replacement
d) decomposition
This type of reaction has only one product
a) combustion
b) single replacement
c) synthesis
d) decomposition
This type of reaction has only one reactant
a) combustion
b) single replacement
c) double replacement
d) decomposition
The number 4 in the reactant 4NaCl represents
a) the subscript
b) the coefficient
c) the ratio of Na to Cl
d) the product
When balancing chemical equations, be sure that that you balance the number of ____ on both sides.
a) subscripts
b) molecules
c) atoms
d) coefficients
What type of reaction is the following: 2Na + Cl2 ---> 2NaCl
a) synthesis
b) decomposition
c) single replacement
d) double replacement
The mass of the products equals the mass of the reactants in the Law of
a) duplicity
b) infinite proportions
c) conservation of energy
d) conservation of mass
Which of the following is NOT evidence of a chemical change?
a) new product formed
b) change of state
c) release of energy
d) bubble formation
You can calculate the mass of an atom by adding the number of
a) protons and electrons
b) isotopes
c) electrons and neutrons
d) protons and neutrons
In the equation 2Na + Cl2 ---> 2NaCl, the NaCl is the
a) reactant
b) product
c) coefficient
d) subscript
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