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3 years ago

A student wants to investigate how the beaver is differnt from most other mammals in the wild

Chemistry

1 answer:

timofeeve [1]3 years ago

4 0

Answer:

I believe the options are:

a. How many other mammals eat trees or other plants to survive?

b. How many other mammals live in an environment that includes water?

c. Do most other mammals have body structures adapted to the places where they live?

d. Do most other mammals change the environment to meet their survival needs?

Explanation:

Beavers, the largest rodents in North America, are classed as a keystone species i.e their presence affects other organisms as well as the abiotic factors in an ecosystem. Beavers enhance the habitat quality of a particular region and make it habitable for other organisms.

Beavers build dams that form wetlands that are home to majority of species in North America.
They filter water from silt and increase the quality of water.
They are "ecological indicators" i.e. they can help establish the health status of an ecosystem.

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4 years ago

You wish to generate 1.00 L of a 0.0750 M NaCl solution by diluting a more concentrated solution. What volume (in mL) of a 0.275

miss Akunina [59]

Taking into account the definition of dilution, you need to use a volume of 272.72 mL of a 0.275 M NaCl solution.

<h3>Dilution</h3>

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

Ci: initial concentration
Vi: initial volume
Cf: final concentration
Vf: final volume

<h3>Initial volume</h3>

In this case, you know:

Ci= 0.275 M
Vi= ?
Cf= 0.0750 M
Vf= 1 L

Replacing in the definition of dilution:

0.275 M× Vi= 0.0750 M× 1 L

Solving:

Vi=(0.0750 M× 1 L)÷ 0.275 M

In summary, you need to use a volume of 272.72 mL of a 0.275 M NaCl solution.

Learn more about dilution:

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2 years ago

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Answer:

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3 years ago

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Rama09 [41]

Answer:

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Explanation:

Step 1: Write the balanced equation at equilibrium

2 NO₂(g) ⇄ N₂O₄(g)

Step 2: Calculate the concentration equilibrium constant

The concentration equilibrium constant (Kc) is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.

Kc = [N₂O₄]/[NO₂]² = 0.2 / 0.2² = 5

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