Which of the following alkanes has a molecular weight closest to 72 g/mol?

Which of the following alkanes has a molecular weight closest to 72 g/mol?

Step 1: Understand that alkanes are hydrocarbons with the general formula CnH(2n+2).
Step 2: Calculate the molecular weight of alkanes using the formula: Molecular weight = (number of carbon atoms * 12) + (number of hydrogen atoms * 1).
Step 3: For C6H14 (hexane), calculate: (6 * 12) + (14 * 1) = 72 + 14 = 86 g/mol.
Step 4: For C7H16 (heptane), calculate: (7 * 12) + (16 * 1) = 84 + 16 = 100 g/mol.
Step 5: Compare the molecular weights: 86 g/mol for C6H14 and 100 g/mol for C7H16.
Step 6: Determine which molecular weight is closest to 72 g/mol. C6H14 is closer than C7H16.

No concepts available.