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Balancing Chemical Reactions
Test Description: Balancing Chemical Reactions
Instructions: Answer all questions to get your test result.
1) What coefficient should be used to make the following equation balanced? N₂+O₂-- _NO
A
3
B
4
C
2
D
1
2) How many HCl molecules do you need to balance this equation? Mg + __HCl --- MgCl₂ + H₂
A
1
B
4
C
3
D
2
3) What is the total number of atoms present in 5Na₃PO₄
A
40
B
55
C
8
D
5
4) Balance this equation _Al +_HCl -- _H₂ +_AlCl₃
A
2,6,3,2
B
1,1,1,1
C
2,1,4,5
D
4,12,3,4
5) What are the coefficients that would properly balance this equation? __Ca + __H₂O -- __Ca(OH)₂ + __H₂
A
1,2,2,4
B
1,2,1,1
C
1,2,2,1
D
2,1,2,1
6) What is the right ratio of chemicals for the Balanced Chemical Equation?__CO + __Fe₂O₃-- __Fe + __CO₂
A
3,2,2,4
B
3,1,2,3
C
3,2,1,1
D
3,2,2,1
7) Which number should go in the blank? Mn + _ HNO₃ → Mn(NO₃)₂ + H₂
A
1
B
3
C
2
D
4
8) Is the equation balanced?: 2H₂O + O₂ -- 4MgO + 3Fe
A
No
B
Yes
9) Balance this equation- __P₄ + __O₂ -- __P₂O₃
A
1,2,3
B
1,1,1
C
1,3,2
D
2,1,3
10) Balance this equation. _CH₄ + _O₂ -- _CO₂ + _H₂O
A
2,1,2,1
B
2,2,1,1
C
1,2,1,2
D
1,2,1,1
*select an answer for all questions
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