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Shalnov [3]
3 years ago
12

The reeds at the edge of a pond form a

Biology
1 answer:
Nina [5.8K]3 years ago
5 0
The choices can be found elsewhere and as follows:

<span>a. climate zone.
b. microclimate.
c. hydrosphere.
d. biosphere.
</span>
I think the correct answer would be option D. <span>The reeds at the edge of a pond form a biosphere where insects or other animals stay. Hope this answers the question.</span>
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The study of oceans and their life.

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The study of oceans, including seawater, the ocean floor, and marine plants and animals.

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Give reasons for the following.
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3 years ago
There are 258 g of MgCl2/liter. What is the molarity of the solution?
Zolol [24]

Taking into account the definition of molarity, the molarity of the solution is 2.7098 moles of MgCl₂/liter.

<h3>Definition of molarity</h3>

Molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles÷ volume

<h3>Molarity of the solution in this case</h3>

In this case, you know that the molar mass of MgCl₂ is 95.21 g/mole [molar mass is the amount of mass that a substance contains in one mole.]

You can apply the following rule of three: If by definition of molar mass 95.21 grams are contained in 1 mole, 258 grams are contained in how many moles?

amount of moles= (258 grams× 1 mole)÷ 95.21 grams

<u><em>amount of moles= 2.7098 moles</em></u>

Replacing in the definition of molarity:

258 g of MgCl₂/liter= <u><em>2.7098 moles of MgCl₂/liter</em></u>

<em />

Finally, the molarity of the solution is 2.7098 moles of MgCl₂/liter.

Learn more about molarity:

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