Final answer:
The molar mass of a compound is determined by summing the atomic masses of each element multiplied by the number of atoms per element in the compound's formula. The correct molar masses for H₂O, CO₂, C₆H₁₂O₆, and NaCl are 18.015 g/mol, 44.009 g/mol, 180.156 g/mol, and 58.443 g/mol, respectively.
Step-by-step explanation:
The molar mass of a compound is the sum of the atomic masses of all the atoms in the molecular formula or formula unit of the compound. To calculate it, you multiply the atomic masses of the elements by the number of atoms of that element in the formula and then sum these values. Here's the calculated molar mass for the given compounds:
- H₂O: Molar mass = (2 x 1.008) + 15.999 = 18.015 g/mol
- CO₂: Molar mass = (1 x 12.011) + (2 x 15.999) = 44.009 g/mol
- C₆H₁₂O₆: Molar mass = (6 x 12.011) + (12 x 1.008) + (6 x 15.999) = 180.156 g/mol
- NaCl: Molar mass = (1 x 22.990) + (1 x 35.453) = 58.443 g/mol
The molar mass of H₂O given in the question (18.015 g/mol) is correct, but the molar masses for CO₂, C₆H₁₂O₆ (glucose), and NaCl listed are incorrect; the correct values are provided above.