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Percent Comp
Test Description: Determine the percent composition
Instructions: Answer all questions to get your test result.
1) What is the percent composition of nitrogen in NaNO3?
A
83.1%
B
64.6%
C
16.9%
D
50%
2) What is the percent composition for each element in water (H2O)?
A
67% H, 33% O
B
2%H, 16% O
C
94% H, 6% O
D
11% H, 89% O
3) What is the percent composition for each element in NH3?
A
14% N, 3% H
B
25% N, 75% H
C
50% N, 50% H
D
82% N, 18 %H
4) What is the percent composition of calcium carbonate (CaCO3)?
A
40% Ca, 12% C, 16% O
B
40% Ca, 12% C, 48% O
C
25% Ca, 15% C, 60% O
D
57% Ca, 9% C, 34% O
5) What is the percent composition of each element in MgCl2
A
26% Mg, 74% Cl
B
50% Mg, 50% Cl
C
42% Mg, 58% Cl
D
59% Mg, 41% Cl
6) What is the percent composition of each element in CaPO4
A
39% Ca, 20% P, 41% O
B
40% Ca, 31% P, 16% O
C
22% Ca, 25% P, 53% O
D
30% Ca, 23% P, 47% O
7) What is the percent composition for each element in Na2SO3
A
23% Na, 32%S, 16%O
B
23% Na, 45% S, 32% O
C
36% Na, 45% S, 23% O
D
36% Na, 25% S, 38% O
8) What is the percent composition for carbon and hydrogen in ethane, C2H6?
A
20% C and 80% H
B
33% C and 66% H
C
80% C and 20% H
D
20% C and 60%H
9) What is the percent oxygen in CO
A
21.4%
B
49.2%
C
57.1%
D
50.0%
10) What is the percent of S in Na2S?
A
33%
B
59%
C
41%
D
66%
*select an answer for all questions
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