Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this

Question

Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F?

none of them are within 2°F of the right answer

–173°F                            Please explain how to answer please. Thank you!

–12.6°F

–109°F

–75.6°F

none of them are within 2°F of the right answer

Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F?

none of them are within 2°F of the right answer

–173°F                            Please explain how to answer please. Thank you!

–12.6°F

–109°F

–75.6°F

none of them are within 2°F of the right answer

Explanation / Answer

°C x 9/5 + 32 = °F

this is the formula for converting ºC to Fahrenheit

put the given ºC you will get the ºF

-78.5º x 9/5 + 32 = ºF

-141.3 + 32 = ºF

-109.3 = ºF

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