JAMB - Biology (2008 - No. 27)
In an experiment to determine the percentage of air in a soil sample, the following readings were recorded:
volume of water in measuring cylinder = 500 cm3
volume of soil added to water = 350 cm3
volume of water and soil after stirring = 800 cm3
the percentage of air in the soil sample is
volume of water in measuring cylinder = 500 cm3
volume of soil added to water = 350 cm3
volume of water and soil after stirring = 800 cm3
the percentage of air in the soil sample is
6.25%
10.36%
14.28%
43.28%
توضیح
The total volume of soil = 350cm³
\(\frac{50}{350} × 100\)
= 14.28%