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WorksheetsChemistry-Chapter 5
Total questions: 16
Worksheet time: 12mins
Which of the following is true of chemical reactions?
They can have changes in energy
They form new substances with new properties
They can be represented by an equation
All of the above
Substances formed as a result of a chemical reaction are called
reactants
precipitates
products
results
Which of the following is not an example of a chemical change?
baking a cake
freezing water
burning a log
sodium and chlorine atoms forming an ionic bond
A number written in front of a chemical formula is called:
product
reactant
subscript
coefficient
A substance present before a reaction.
acid
product
reactant
base
A reaction in which compounds are broken down into simpler substances.
synthesis
single replacement
combustion
decomposition
A reaction in which one element replaces another in a compound.
single replacement
synthesis
combustion
double replacement
A reaction in which substances combine to form a more complex compound.
single replacement
synthesis
combustion
decomposition
In a balanced equation, coefficients are equal.
True
False
All of the following are true regarding the law of conservation of mass EXCEPT for.
atoms are not created or destroyed during a chemical reaction
there are the same amount of atoms of reactants as the atoms in the products
a chemical equation is considered balanced
reactants must be less than the products
Which best describes bases?
they taste sour
they taste bitter
they react with metals
Because it wears away certain materials, an acid is described as
concentrated
corrosive
contaminated
carbonated
Al3(SO4)3
How many oxygen atoms are there in this compound?
3
9
12
15
3 ZnCl2
How many Chlorine atoms are there?
2
3
5
6
Co + H2O → Co2O3 + H2
The above equation is balanced
True
False
Which is balanced correctly?
2 Co + 3 H2O → 2 Co2O3 + H2
2 Co + 3 H2O → Co2O3 + 3 H2
2 Co + H2O → 2 Co2O3 + 3 H2
2 Co + 2 H2O → 2 Co2O3 + 2 H2
