Calculate the number of moles of oxygen that will dissolve in 45 L of water at 20^$\omicron$C if the partial pressure of oxygen is 0.21 atm .Henry's constant for oxygen is 0.0013 mol . L ^- ¹ . atm ^- ¹.

Question

Quizplus · Accepted Answer

First, we need to use Henry's law to calculate the concentration of oxygen in water:

C = kH * P

where C is the concentration, kH is Henry's constant, and P is the partial pressure. Plugging in the values given:

C = 0.0013 mol/L/atm * 0.21 atm = 0.000273 mol/L

Next, we need to convert this to moles of oxygen in 45 L of water:

moles = concentration * volume

moles = 0.000273 mol/L * 45 L = 0.0123 mol

Rounding to three significant figures gives 0.012 mol, or choice C.

Calculate the Number of Moles of Oxygen That Will Dissolve ο\omicronο

Calculate the Number of Moles of Oxygen That Will Dissolve $\omicron$