Answer:
194,22g/mol
Explanation:
8*12,01+10*1,01+4*14,01+2*16=194,22g/mol
Answer:
194.19 g/mol
Explanation: In calculating the molecular weight given the molecular formula of a compound, we must first determine the type and number of atoms present. For caffeine with a molecular formula of
C
8
H
10
N
4
O
2
, there are 8 carbon atoms, 10 hydrogen atoms, 4 nitrogen atoms, and 2 oxygen atoms. Next, we must look for the molar masses of each atom in the periodic table, then multiply them by the number of the atom in the compound. Carbon (C):
8
×
12.01 gmol
=
96.08 gmol Hydrogen (H):
10
×
1.008 gmol
=
10.08 gmol
Nitrogen (N):
4
×
14.01 gmol
=
56.04 gmol
Oxygen (O):
2
×
16.00 gmol
=
32.00 gmol
Finally, we can now calculate for the molecular weight of caffeine simply by adding the total molar masses of the constituent atoms:
96.08 gmol
+
10.08 gmol
+
56.04 gmol
+
32.00 gmol
=
194.20 gmol
Therefore, caffeine has a molecular weight of 194.20 g/mol.,
