The following statement about soil formation are true:
1. The composition of soil depend largely on the composition of the parent rock.
2. Strong roots of shrubs and trees hold on to soil and protect it from erosion.
3. Soil formed from local rock is residual soil and soil formed from distant rock is transported soil.
Soil are typically formed from rocks. The nature of the soil depend on the type of rock from which the soil was formed. It takes a long time for a soil to be formed from a parent rock. Erosion is the process that carries the surface soil away, but the root of shrub and trees usually prevent this by holding on to the soil particles.
Answer:
The characteristics given is present in the animal:
A. Polar bear
Explanation:
Here, in the question the characteristics given refers to the animal Polar bear as it has all the characteristics which are mentioned here.
Polar bear:
<u>Habitat: </u> They stay on the sea ice. They are found in five nations across the arctic i.e. U.S., Canada, Russia, Greenland and Norway.
<u>Skin, ears and tails: </u> Polar bears are covered with black skin over which there is a thick layer of fat to keep them warm in extreme temperatures.
<u>Paws and claws: </u> They are not designed just to stay on land but they can also survive when swimming they use their hind paws and large paddles.
Claws help them in climbing and digging.
Answer: 330 K
Explanation: Charles Law
V1/ T1 = V2/ T2
Derive the equation to find T2
T2 = V2 T1 / V1
Solution attached.
Answer:
B. ethylamine.
Explanation:
- Since the compound contains NH₂, it is an amine compound.
- The alkyl group C₂H₅- contains 2 C atoms (ethyl group).
<em>So, the compound is ethylamine.</em>
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Molar mass of NaOH = 23 + 16 + 1 = 40.0 g/mol
Molar mass of HCl = 1 + 35.5 = 36.5 g/mol
NaOH + HCl = NaCl + H2O
1*40 g NaOH ------> 1*36.5 g HCl
g NaOH -------> 7.3 g HCl
36.5 g = 40 * 7.3
36.5 g = 292
mass ( NaOH ) = 292 / 36.5
mass ( NaOH ) = 8.0 g of NaOH
hope this helps!.