Conservation of Mass
Types of Reactions
Balancing Equations
Reaction Rates
Moles
100
Mass can neither be created nor _____ in a reaction
Destroyed
100
Which type of reaction is shown below
H2O2--> H2O + O2
Decomposition
100
What numbers balance the following equation
____Na + ___ Cl2 --> ___NaCl
_2_Na + ___ Cl2 --> _2_NaCl
100
A substance that increases the rate of a chemical reaction, but is not consumed by the reaction is called a _____.
- catalyst
- product
- reactant
- catalyst
100
A mole is _____ particles (atoms, molecules, ions etc)
6.02 x 1023
200
The mass (and number of each type of atom) of the reactants must _____ the mass (and number of each type of atom) of the product
a. be less than
b. be equal too
c. be greater than
b. be equal too
200
Which type of reaction is shown below
Na + AgNO3 --> Ag + NaNO3
Single Replacement
200
What numbers balance the following equation
____Mg + ____HCl -->____ H2 + ______MgCl2
____Mg + __2__HCl -->____ H2 + ______MgCl2
200
How does enzymes speed chemical reactions?
They lower the activation energy needed to start the reaction
200
Molar mass means
The mass of one mole of a substance. The unit is grams/mole (grams per mole), or g/mol.
300
In a reaction 54 grams of aluminum react with an unknown about of sulfur to make 150 grams of aluminum sulfide. How many grams of sulfur were needed
96 g
300
Which type of reaction is shown below
Al(NO3)3 + Na3PO4--> NaNO3 + AlPO4
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Double Replacement
300
Balance the following equation
____Al2S3 + ____MgO --> ____Al2O3 + _____ MgS
____Al2S3 + __3_MgO --> ____Al2O3 + __3__ MgS
300
Increasing the temperature of the reactants can speed a reaction by:
a. Breaking all the bonds in the reactants
b. Increasing collisions between reactants
c. Increasing the activation energy of the reaction
b. Increasing collisions between reactants
300
Find the molar mass of NaOH
40 g/mol
400
In a reaction 12 g of carbon react with 32 grams of oxygen to make how many grams of carbon dioxide?
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44 g
400
Which type of reaction is shown below
Na + Cl2 --> NaCl
Synthesis
400
Balance the following equation
___Na3PO4 + __Al(OH)3 -->___AlPO4 + ___NaOH
___Na3PO4 + __Al(OH)3 -->___AlPO4 + _3__NaOH
400
Which is an exothermic reaction (left or right)
The image on the right
400
What is the percentage by mass of oxygen in AgNO3
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28% (48/170) x 100
Ag=108
N=14
O=16 x 3 = 48
500
Reaction equations must be balanced to satisfy
a. the laws of thermodynamics
b. The law of conservation of mass
c. The laws of relativity established by Einstein
b. The law of conservation of mass
500
Which type of reaction is shown below
C3H8 + O2--> CO2 + H2O
Combustion
500
Balance the following equation
_____C2H6 + ____O2 --> ___CO2 + ___H2O
__2_C2H6 + __7_O2 --> _4_CO2 + _6_H2O
500
In the reaction H2O2-->H2O + O2, The reactant(s) is
a. H2O + O2
b. H2O2 and H2O
c. H2O2
c. H2O2
500
What is the mass of 1.2 moles of NaCl?
Molar mass of NaCl is 58 g/mol
1.2 x 58 =69.6 g