My data: -molar mass of stearic acid (g/mol) : 284.5 g/mol -density of stearic a

Question

My data:

-molar mass of stearic acid (g/mol) : 284.5 g/mol

-density of stearic acid (g/cm^3) : 0.94 g/cm^3

-# drops per ml : 82(trial 1), 83(trial 2), 83(trial3)

- concentration of stearic acid solution (g/L) : 0.0246 g/l

-# drops to form monolayer (drops/monolayer): 36 (trial 1), 34 (trial 2)

- watch glass diameter(cm): 9.9cm

1. volume of one drop (mL/drop)- determine the volume of one drop delivered by the pipet based on the average number of drops per mL. (the average number of drops is 82.66drops/mL)

Explanation / Answer

1.

1 ml = 82.66 drop then

1 drop = 1 X 1 / 82.66 = 0.0121 ml

volume of 1 drop = 0.0121 ml / drop

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