Calculate the molar mass of caffeine, C8H10N4O2.
194.22 g
110.15 g
43.03 g
194 g
The molar mass of caffeine, C8H10N4O2, can be calculated by adding up the atomic masses of all the atoms in the compound.
C: 12.01 g/mol (8 atoms)
H: 1.008 g/mol (10 atoms)
N: 14.01 g/mol (4 atoms)
O: 16.00 g/mol (2 atoms)
Molar mass = (12.01 g/mol x 8) + (1.008 g/mol x 10) + (14.01 g/mol x 4) + (16.00 g/mol x 2)
Molar mass = 96.08 g/mol + 10.08 g/mol + 56.04 g/mol + 32.00 g/mol
Molar mass = 194.20 g/mol
Therefore, the molar mass of caffeine is 194.20 g/mol, which is closest to 194 g.
To calculate the molar mass of caffeine, C8H10N4O2, we need to find the atomic masses of each element in the compound and add them up.
The atomic masses are:
C (Carbon) = 12.01 g/mol
H (Hydrogen) = 1.01 g/mol
N (Nitrogen) = 14.01 g/mol
O (Oxygen) = 16.00 g/mol
Now, let's calculate the molar mass:
(8 * C) + (10 * H) + (4 * N) + (2 * O) = (8 * 12.01) + (10 * 1.01) + (4 * 14.01) + (2 * 16.00) = 96.08 + 10.10 + 56.04 + 32.00 = 194.22 g/mol
Therefore, the molar mass of caffeine (C8H10N4O2) is 194.22 g/mol.
So, the correct answer is 194.22 g.
To calculate the molar mass of a compound, you need to determine the sum of the atomic masses of all the atoms present in the compound.
To find the molar mass of caffeine (C8H10N4O2), you can use the periodic table to find the atomic masses of each element and then multiply it by the number of atoms present in the compound.
The atomic mass of carbon (C) is 12.01 g/mol, hydrogen (H) is 1.01 g/mol, nitrogen (N) is 14.01 g/mol, and oxygen (O) is 16.00 g/mol.
Next, multiply the atomic mass by the number of atoms present in the compound:
C: 8 atoms x 12.01 g/mol = 96.08 g/mol
H: 10 atoms x 1.01 g/mol = 10.10 g/mol
N: 4 atoms x 14.01 g/mol = 56.04 g/mol
O: 2 atoms x 16.00 g/mol = 32.00 g/mol
Now, add up the individual masses:
96.08 g/mol + 10.10 g/mol + 56.04 g/mol + 32.00 g/mol = 194.22 g/mol
So, the molar mass of caffeine (C8H10N4O2) is 194.22 g/mol. Therefore, the correct answer is 194.22 g.