Question

what is the formula mass (molar mass) of sucrose (c₁₂h₂₂o₁₁), table sugar?
386 g/mol
342 g/mol
130 g/mol
29 g/mol

Explanation:

Step1: Find atomic masses

Atomic mass of C: $12.01$ g/mol, H: $1.008$ g/mol, O: $16.00$ g/mol.

Step2: Calculate mass for each element

For C: $12 \times 12.01 = 144.12$ g/mol.
For H: $22 \times 1.008 = 22.176$ g/mol.
For O: $11 \times 16.00 = 176.00$ g/mol.

Step3: Sum the masses

Total molar mass = $144.12 + 22.176 + 176.00 = 342.296 \approx 342$ g/mol.

Answer:

342 g/mol (the option: 342 g/mol)