Dry ice (carbon dioxide) changes from a solid to a gas at -78.5°C. What is this temperature in °F?
A) -173°F
B) -12.6°F
C) -109°F
D) -75.6°F
E) None of them is within 2°F of the right answer.

Question

Quizplus · Accepted Answer

To convert from Celsius to Fahrenheit, use the formula F = (C × 9/5) + 32. For -78.5°C, F = (-78.5 × 9/5) + 32 = -109.3°F, which rounds to -109°F.

Dry Ice (Carbon Dioxide) Changes from a Solid to a Gas