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Chemical Formulas And Counting Atoms
Test Description: Questions about subscripts, coefficients and molecules.
Instructions: Answer all questions to get your test result.
1) How many oxygen atoms in CO2 ?
A
1
B
4
C
3
D
2
2) How many oxygen atoms in 3CO2 ?
A
5
B
6
C
7
D
4
3) How many atoms in 4NaCl ?
A
4
B
8
C
12
D
2
4) How many molecules in 12 HOH ?
A
3
B
6
C
2
D
12
5) How many hydrogen atoms in 12 HOH ?
A
3
B
24
C
12
D
2
6) How many elements in NaClHNOPS ?
A
9
B
14
C
7
D
1
7) How many sodium atoms in 5NaClS ?
A
1
B
15
C
5
D
3
8) How many atoms in 14NaCl ?
A
14
B
28
C
2
D
15
9) Which is NOT a compound?
A
CO2
B
NaCl
C
H2O
D
O2
10) How many total atoms are in 4 H2SO4 ?
A
5
B
20
C
4
D
28
*select an answer for all questions
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