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: Option A
Explanation
Mass of Soil = 101.5 - 80.5 = 21.0g Mass of humus = (99.0 - 95.5)g = 3.5g % of humus = \(\frac{3.5}{21.0} \times \frac{100}{1}} = 16.7%
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