A 1.0 mol sample of which of the following compounds has the greatest mass?

• A. CO2
• B. C6H12O6
• C. NaCl
• D. H2O

Answer: (B)

Verified step by step guidance

1. Identify the molar mass of each compound by summing the atomic masses of all atoms in one mole of the compound. Use the periodic table values: C = 12 g/mol, H = 1 g/mol, O = 16 g/mol, Na = 23 g/mol, Cl = 35.5 g/mol.
2. Calculate the molar mass of CO2: multiply the atomic mass of carbon by 1 and oxygen by 2, then add them together using the formula \(\mathrm{Molar\ mass} = (1 \times 12) + (2 \times 16)\).
3. Calculate the molar mass of C6H12O6: multiply the atomic masses by the number of atoms in the formula and sum them using \(\mathrm{Molar\ mass} = (6 \times 12) + (12 \times 1) + (6 \times 16)\).
4. Calculate the molar mass of NaCl: sum the atomic masses of sodium and chlorine using \(\mathrm{Molar\ mass} = 23 + 35.5\).
5. Calculate the molar mass of H2O: sum the atomic masses of hydrogen and oxygen using \(\mathrm{Molar\ mass} = (2 \times 1) + 16\). Compare all molar masses to determine which compound has the greatest mass for 1.0 mol.