The Steller sea lion population has been decreasing in parts of Alaska. New evidence suggests that Steller sea lions need herring as a part of their diet in order to survive. Pollock, another type of fish, also feed on herring. Which would most likely help the Steller sea lion population to increase?
Answers
Answer:
Improving the habitats of herring thereby increasing their population.
Explanation:
First, two consumers (Steller sea lion and Pollock) are both competing for common prey (herring). Since the question only asked what could be done to increase the decreasing Steller sea lion population of Alaska, the focus would be made only on the Steller sea lion.
The Steller sea lion population would increase if:
1. The herring population should be increased by improving the food available for them to feed on, and improving their reproduction capacities to enable them to reproduce efficiently.
2. Since there are 2 predators. If the population of the prey is fixed, then Pollock should be more hunted by farmers or other biological means to eliminate competition.
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Answers
A saturated solution is a solution that can not dissolve any more solute in it. The amount of potassium nitrate that can be dissolved to make a saturated solution is 29 gm.
What is solubility?
The capability of the solute to get dissolved in the solvent to form a saturated solution is called solubility.
The solubility of potassium nitrate in 100 gm of water at 40 degrees celsius is 64 gm. Hence, 64 gm of potassium nitrate is required in 100 gm of water to form a saturated solution.
In the question, the amount of potassium nitrate in 100gm water is 35 gm so, the amount of the potassium nitrate required more will be,
Therefore, option (1) 29 gm of potassium nitrate should be added more.
Learn more about solubility here:
The solubility of at 40 C is around 64 g in 100 g water ot 0.64 g KNO3 in 100 g water.
Therefore 64 g KNO3 in 100 g water is required for satured solution.
According to the problem there are 35 grams of KNO3 dissolved in 100 grams water
So we need 64 g-35 g= 29 g more KNO3
Hence the correct answer is 1
Solubility:
When the maximum amount of solute is dissolve in the solvent is called solubility. On the basic of solubility the solution are following types:
Saturate solution:
A solution which contains the maximum amount of dissolved solute at the equilibrium is called saturated solution.
Un-saturate solution:
A solution which contains lesser amount of solute as compare to saturated solution. It will be able to dissolver more solute.
Super -Saturate solution:
A solution which contains the more dissolved amount of solute as compare to saturated solution.
Answers
Answers
Trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.
What is a catalyst?
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.
A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.
Catalysts slow down reaction rates which will in turn mean a loweractivation.
Hence, trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.
Learn more about the catalyst here:
#SPJ2
Answer:
It will have a lower activation energy than Trial A.
Explanation:
Trail B will have a lower activation energy than trail A because in this trial the scientist adds a catalyst. Catalysts slow down reaction rates which will in turn mean a lower activation.
FALSE
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Answers
I hope this helps. Let me know if anything is unclear.
Answer:
Decreases abs basicity decrease
Explanation:
B. 6
C. 18
D. 36
**MY answer: C. 18
Which of the following is a homogenous mixture of two or more pure substances?
A. oxygen
B. water
C. air
D. alcohol
**MY answer: D. alcohol
are they correct???
Answers
Your answer is correct
Which of the following is a homogenous mixture of two or more pure substances?
C. air
Your answer is wrong.
Answer:
1) The correct answer is option C.
2) the correct answer is option C.
Explanation:
1) Molecular formula of glucose =
Number of carbon atoms in single molecule = 6
Number of carbon atoms in 3 molecule of glucose :
of carbon
There are 18 carbon atoms in the 3 molecules of glucose.
2) Homogeneous mixture is the mixture in which components are evenly distributed throughout the mixture. The shape and size of the particles are identical in the mixture.
Heterogeneous mixture is the mixtures in which component are unevenly distributed throughout the mixture. The shape and size of the particles are not identical in the mixture.
Air is the mixture of gases with 78% of nitrogen gas, 21% of oxygen gas and remaining 1 % are other gases. Air is a homogeneous mixture of different gases.
Where as water, oxygen , alcohol are pure substances.