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
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: Option 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%