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Trimester 1: Balancing Chemical Equations
Test Description: Practice
Instructions: Answer all questions to get your test result.
1) What coefficients are needed to balance the following equation: __H2 + __O2 = __H2O
A
1, 2, 1
B
2, 2, 2
C
1, 1, 1
D
2, 1, 2
2) How many atoms does the compound, K2MnO7 contain?
A
14
B
1
C
11
D
10
3) How many reactants exists in the following equation?: NH3 + HCl = NH4Cl
A
3
B
11
C
2
D
6
4) How many products does the reaction, NH3 + HCL = NH4Cl, contain?
A
3
B
6
C
1
D
7
5) Which of the following compounds contains the MOST atoms?
A
K2MnO7
B
Al2(SO4)3
C
Hg2(NO3)2
D
C4H4F4Cl2
6) Chemical equations illustrate
A
Law of Conservation of Energy
B
chemical reactions
C
all of the above
D
Law of Conservation of Matter
7) Which of the following equations is correctly balanced?
A
H2 + O2 = H2O
B
AsCl3 + 3H2O = 3HCl + As(OH)3
C
2Na + O2 = 2Na2O
D
Sn + 2KOH = K2SnO2 + 2H2
8) What coefficients will balance the following equation, __AsCl3 + __H2O = __HCl + __As(OH)3?
A
1, 3, 3, 1
B
3, 3, 1, 1
C
3, 1, 3, 1
D
1, 3, 1, 3
9) What coefficients will balance the following equation: __Na + __O2 = __Na2O
A
1, 2, 4
B
4, 1, 2
C
1, 4, 2
D
none of the above
10) An equation is balanced when there is equal
A
all of the above
B
number of protons for the reactants and products of a reaction
C
types and numbers of atoms for the reactants and products of a reaction
D
numbers of reactants and products for a reaction
*select an answer for all questions
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