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Chemistry preassessment February
By Joseph Morsaw
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Last updated over 3 years ago
17 questions
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Question 1
1.
Iron rusts according to the following equation: __ Fe
(s)
+ __ O
2(g)
→ __ Fe
2
O
3(s)
What are the respective coefficients when the equation is balanced with the smallest integer values?
4, 3, 2
4, 2, 3
1, 2, 3
1, 3, 2
Question 2
2.
Balance each chemical equation.
A) ____ C
5
H
12(g)
→____ C
(g)
+ ____ CH
4(g)
Find the first blank
Question 3
3.
Balance each chemical equation.
A) ____ C
5
H
12(g)
→____ C
(g)
+ ____ CH
4(g)
Find the second blank
Question 4
4.
Balance each chemical equation.
A) ____ C
5
H
12(g)
→____ C
(g)
+ ____ CH
4(g)
Find the third blank
Question 5
5.
Balance each chemical equation.
B) ____ Sr
(s)
+ ____ F
2(g)
→____ SrF
2(s)
Find the first blank
Question 6
6.
Balance each chemical equation.
B) ____ Sr
(s)
+ ____ F
2(g)
→____ SrF
2(s)
Find the second blank
Question 7
7.
Balance each chemical equation.
B) ____ Sr
(s)
+ ____ F
2(g)
→____ SrF
2(s)
Find the third blank
Question 8
8.
Balance each chemical equation.
C) ____ Al
2
(CO
3
)
3(s)
→ ____ Al
2
O
3(s)
+ ____ CO
2(g)
Find the first blank
Question 9
9.
Balance each chemical equation.
C) ____ Al
2
(CO
3
)
3(s)
→ ____ Al
2
O
3(s)
+ ____ CO
2(g)
Find the second blank
Question 10
10.
Balance each chemical equation.
C) ____ Al
2
(CO
3
)
3(s)
→ ____ Al
2
O
3(s)
+ ____ CO
2(g)
Find the third blank
Question 11
11.
Balance each chemical equation.
D) ____ Ni
2
S
3(s)
→ ____ Ni
(s)
+ ____ S
(s)
Find the first blank
Question 12
12.
Balance each chemical equation.
D) ____ Ni
2
S
3(s)
→ ____ Ni
(s)
+ ____ S
(s)
Find the second blank
Question 13
13.
Balance each chemical equation.
D) ____ Ni
2
S
3(s)
→ ____ Ni
(s)
+ ____ S
(s)
Find the third blank
Question 14
14.
Balance each chemical equation.
E)_____C
3
H
6
______O
2
→______CO ______H
2
O
Find the first blank
Question 15
15.
Balance each chemical equation.
E)_____C
3
H
6
______O
2
→______CO ______H
2
O
Find the second blank
Question 16
16.
Balance each chemical equation.
E)_____C
3
H
6
______O
2
→______CO ______H
2
O
Find the third blank
Question 17
17.
Balance each chemical equation.
E)_____C
3
H
6
______O
2
→______CO ______H
2
O
Find the fourth blank