First, we need to recall the chemical formula of aspirin
(acetylsalicylic acid): C9 H8 O4
Now, we'll have to
determine the mass of each component atom:
The atomic mass
of C = 12 g
The atomic mass of H = 1
g
The atomic mass of O = 16
g
Now, we need to multiply each atomic mass by the
specific number of atoms:
C9 = 9*12 = 108 g
(1)
H8 = 8*1 = 8 g (2)
O4 =
4*16 = 64 g (3)
Now, we'll add
(1),(2),(3):
C9 + H8 + O4 = 108 + 8 + 64 = 180
g
The molar mass of aspirin is of 180
g.
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