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CBS SCIENCE EXAM CH 5
Terms in this set (31)
which type of chemical reaction has only one reactant?
which can be used to decrease the amount of activaiton energy needed
add a catalyst
in which type of reaction do the products have more energy that the reactants
when sodium reacts with water heat is produced making this a
which of the following is a way to increase teh rate of chemical reaction?
increase the concentration
which type of chemical reaction requires more activation energy to keep reacting
whcih of the following is a way to decrease the rate of a chemical reaction
a solid that forms from solution during a chemical reaction is called
a reaction that absorbs energy in the form of heat is described as
in a chemical reaction
energy is either absorbed or released
which process changes matter into one or more new substance?
the substances listed on the left side of a chemical equation are
the force that holds atoms together is called
a chemical bond
what happens when chemical bonds break and new bonds form?
a chemical reaction
which is a balanced chemical equation?
a. H202--- H2O+O3
b. 2 FeO3 +3C --- 4Fe + 3 CO2
c. SO2 + O2 + 2H2O --- 4 H2SO4
d. 2 Mg + HCl --- MgCl2 + H2
2 FeO3 + 3 C --- 4 Fe + 3 CO2
chemicals that act as biological catalysts by speeding up reactions in living thins are
when 2 or more substance combine to make a more complex compound, the process is called
a material used to decrease the rate of a chemical reaction is a(n)
the chemical reaction between copper oxide and carbon that produces copper and carbon dioxide (CuO + C --- Cu + CO2) is an example of
to balance the chemical equation in which hydrogen and oxygen are combined to yield water (H2 + O2---H2O one would need to
change only the coefficient of H2 to 2
the minimum amount of energy that has to be added to start a reaction is
which of the following does not increase he number of particles of a substance available to react in a chemcial reaction
adding a catalyst
sulfur dioxide, oxygen, and water combine to produce sulfuric acid (2SO2 + O2 + 2 H2O --- 2 H2SO4) this chemcial reaction is
a synthesis reaction
when chemical reactions occur there is always a change in what
properties and energy content
chemical bonds are formed by what
the valence electrons of the reactant atoms
T/F Are atoms created during chemical reactions
will catalysts change during the chemical reactions
are the number of atoms on the reactant side greater than the number of atoms on the atoms on the product side?
The arrow in the chemical equation is translated as what
if no activation energy is available, then will a chemical reaction still occur but at a slower rate
What are the 5 signs of evidence that make a chemical reaction?
heat temperature- makes the container hotter or colder
precipitate- a solid that forms from the solution during a chemical reaction,
change in color - according to the light color changes,
change in properties chemical chane
This set is often in folders with...
CBS SCIENCE EXAM CH 2
CBS SCIENCE EXAM CH. 3
CBS SCIENCE EXAM CH. 4
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