In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained Weight of the evaporating basin alone = 80.5g Weight of basin and soil = 101.5g Weight after drying the soil in the oven = 99.0g Weight of basin and roasted soil = 95.5g The percentage of humus in the soil sample is
A. 16.7% B. 17.6% C. 26.7% D. 16.2%
Correct Answer: A
Explanation
Mass of Soil = 101.5 - 80.5 = 21.0gMass of humus = (99.0 - 95.5)g = 3.5g% of humus = \(\frac{3.5}{21.0} \times \frac{100}{1}}= 16.7%
