give the empirical formula and compound identity

Question

% C
% H
% N
% O
Location
Empirical Formula
Compound Identity

81.80
6.11
0
12.09
Face


79.21
5.71
--
15.08
Stomach


68.54
6.72
4.42
20.29
Pockets
(2000 tablets)


14.60
2.05
17.04
58.38
Blood


75.50
13.49
11.01
0
Blood


24.25
2.38
14.14
59.23
Pockets


54.64
7.31
0
38.05
Pockets


77.19
6.99
0
15.82
Pockets


80.21
9.94
9.85
0
Pockets


75.68
8.81
0
15.51
Pocket


72.20
7.08
4.68
16.03
Pocket


75.50
13.49
11.01
0
Pocket
(in syringes)

Answer 1

81.80% C, 6.11% H, 0% N, 12.09% O
Empirical Formula: C4H3O
Compound Identity: Acetaldehyde

79.21% C, 5.71% H, 15.08% O
Empirical Formula: C3H4O2
Compound Identity: Acetic acid

68.54% C, 6.72% H, 4.42% N, 20.29% O
Empirical Formula: C6H7NO2
Compound Identity: Caffeine

14.60% C, 2.05% H, 17.04% N, 58.38% O
Empirical Formula: C2H3NO3
Compound Identity: Nitroglycerin

75.50% C, 13.49% H, 11.01% N
Empirical Formula: C5H7N
Compound Identity: Nicotine

24.25% C, 2.38% H, 14.14% N, 59.23% O
Empirical Formula: C2H4NO2
Compound Identity: Glycine

54.64% C, 7.31% H, 38.05% O
Empirical Formula: C3H4O
Compound Identity: Acetone

77.19% C, 6.99% H, 15.82% O
Empirical Formula: C5H8O
Compound Identity: Methyl isopropyl ketone

80.21% C, 9.94% H, 9.85% N
Empirical Formula: C2H3N
Compound Identity: Acetonitrile

75.68% C, 8.81% H, 15.51% O
Empirical Formula: C5H9O
Compound Identity: Isopropyl alcohol

72.20% C, 7.08% H, 4.68% N, 16.03% O
Empirical Formula: C5H7NO
Compound Identity: Nicotinamide

75.50% C, 13.49% H, 11.01% N
Empirical Formula: C5H7N
Compound Identity: Nicotine (in syringes)