If acetic acid is the only acid that vinegar contains (ka=1.8×10−5), calculate the initial concentration of acetic acid in the vinegar. express your answer using two significant figures.

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.