The total mass of all liquid water on Earth, including water vapor in the air and water contained in plants and animals, is approximately 1.386 x 10^21 kg. 
To convert this to ounces, we can use the conversion factor 1 kg = 35.27396 ounces. 

(1.386 x 10^21 kg) x (35.27396 oz/kg) ≈ 4.89 x 10^22 oz

So, the mass of all liquid water on Earth is approximately 4.89 x 10^22 ounces.
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