Final answer:
The melting point of naphthalene on the Celsius scale is approximately 80°C, and on the Fahrenheit scale, it is approximately 176°F, corresponding to option A.
Step-by-step explanation:
Naphthalene melts at 353 K. To convert this to the Celsius scale, we subtract 273.15 from the Kelvin temperature: 353 K - 273.15 = 79.85°C, which is approximately 80°C. To convert Celsius to Fahrenheit, we use the formula (C × 9/5) + 32: (79.85°C × 9/5) + 32 = 175.73°F, which is approximately 176°F. Therefore, the melting point of naphthalene on the Celsius and Fahrenheit scales is approximately 80°C and 176°F, respectively, which corresponds to option A.