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Understanding Chemical Formulas
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by Donald LaMarr
| 31 Questions
Note from the author:
Counting the number of atoms in a chemical formula
Calculate the individual and total number of atoms in each of the following chemical formulas.
Hint: Treat coefficients like the distributive property and subscripts like exponents.
1
NaCl (use this space to show any work)
2
1 pt
Na-
3
1 pt
Cl-
4
1 pt
Total number of atoms
5
4Al(C2H3O2)3 (use this space to show any work)
6
1 pt
Al-
7
1 pt
H-
8
1 pt
C-
9
1 pt
O-
10
1 pt
Total number of atoms
11
6H2SO4 (use this space to show any work)
12
1 pt
H-
13
1 pt
S-
14
1 pt
O-
15
1 pt
Total number of atoms
4Si(HCO3)4
16
1 pt
Si-
17
1 pt
H-
18
1 pt
C-
19
1 pt
O-
20
1 pt
Total number of atoms
2HNO3
21
1 pt
H-
22
1 pt
N-
23
1 pt
O-
24
1 pt
Total number of atoms
KMnO4
25
1 pt
K-
26
1 pt
Mn-
27
1 pt
O-
28
1 pt
Total number of atoms
8K2SO4
29
1 pt
K-
30
1 pt
S-
31
1 pt
O-
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