Why does a carbonated soft drink lose carbonation when the container is left open?

Pressure decreases when you open the top. Pressure decreases, which favors the formation of H2CO3.

I better get your number.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.