In an experiment to determine the percentage of humus and...
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
16.7%
17.6%
26.7%
16.2%
Correct answer is A
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%
The point marked I is referred to as ...
Which of these is not a type of soil? ...
The vector of the malaria parasite is ...
Which of the following is an example of an abiotic ecological factor? ...
Which one is NOT an essential part of a flower? ...
The organelle responsible for sexual reproduction is ...
Different tissues in plants contribute to the support of its parts as a result of the following...
The division of a body into two equal halves along a longitudinal plane is called ...