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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
2
C
4
D
3
2) How many oxygen atoms in 3CO2 ?
A
4
B
7
C
5
D
6
3) How many atoms in 4NaCl ?
A
4
B
8
C
12
D
2
4) How many molecules in 12 HOH ?
A
2
B
12
C
6
D
3
5) How many hydrogen atoms in 12 HOH ?
A
12
B
3
C
2
D
24
6) How many elements in NaClHNOPS ?
A
14
B
1
C
9
D
7
7) How many sodium atoms in 5NaClS ?
A
5
B
15
C
3
D
1
8) How many atoms in 14NaCl ?
A
2
B
28
C
14
D
15
9) Which is NOT a compound?
A
H2O
B
NaCl
C
O2
D
CO2
10) How many total atoms are in 4 H2SO4 ?
A
20
B
5
C
4
D
28
*select an answer for all questions
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