-If the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct?

N2O4 <--> 2NO2 + 14 kcal
N2O4 <--> 2NO2, HR = +14 kcal
N2O4 + 14 kcal <--> 2NO2
N2O4 <--> 2NO2, HR = -14 kcal

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point

Need , hurry pls create a superhero out of the element iron, what are its powers and his sidekick ( an element that works well with iron). how was the superhero made and who discovered him