What is the molar mass of methanol (CH3OH)?

• A. 32.04 g/mol
• B. 28.05 g/mol
• C. 18.02 g/mol
• D. 44.01 g/mol

Answer: (A)

Verified step by step guidance

1. Identify the molecular formula of methanol, which is CH\3OH. This means the molecule contains 1 carbon (C), 4 hydrogens (H), and 1 oxygen (O) atom.
2. Find the atomic masses of each element from the periodic table: Carbon (C) is approximately 12.01 g/mol, Hydrogen (H) is approximately 1.008 g/mol, and Oxygen (O) is approximately 16.00 g/mol.
3. Calculate the total mass contributed by each element by multiplying the atomic mass by the number of atoms in the molecule: For carbon, multiply 12.01 g/mol by 1; for hydrogen, multiply 1.008 g/mol by 4; for oxygen, multiply 16.00 g/mol by 1.
4. Add all these contributions together to get the molar mass of methanol: \(\text{Molar mass} = (1 \times 12.01) + (4 \times 1.008) + (1 \times 16.00)\) g/mol.
5. Sum the values from the previous step to find the total molar mass of methanol in g/mol.