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Stiochemiotry
Test Description: Understanding the definitions of moles and chemical reactions.
Instructions: Answer all questions to get your test result.
1) Which type of Chemical Equation involves one compound breaking apart into two or more molecules?
A
Double Replacement
B
Synthesis
C
Single Replacement
D
Decomposition
2) The mass of reactants must equal the mass of the products due to the Law of...
A
Avagadro's Number
B
Gravity
C
Conservation of Mass
D
Multiple Proportions
3) The limiting reactant of a candle burning under a jar is the...
A
candle
B
jar
C
Carbon dioxide
D
oxygen
4) The reactant that is used up first in a chemcial reaction is known as the ____ reactant.
A
Excess
B
Limiting
C
Surplus
D
Restricting
5) Where do you find information needed to help you convert between moles and grams?
A
Avogadro's #
B
Mole Ration
C
Periodic Table
D
# of moles
6) The SI unit used to measure the number of particles in a substance is called the...
A
liter
B
meter
C
mole
D
kilogram
7) How many grams are in 4.5 moles of oxygen?
A
72 grams
B
2.709 x 10^24 grams
C
36 grams
D
0.28 grams
8) When gas burns to cook food, the type of reaction is...
A
decomposition
B
single replacement
C
combustion
D
synthesis
9) How many particles are in 9.6 moles of calcium?
A
1.59 x 10^-23 particles
B
0.24 particles
C
5.78 x 10^24 particles
D
384 particles
10) The number 6.02 times 10 to the 23rd power is known as...
A
Avogadro's Number
B
Schrodinger Number
C
Einsteins Constant
D
Planck's constant
*select an answer for all questions
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