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Sav [38]
2 years ago
14

Pls describe the water system in the southwest USA and current complications. describe two or three ways that everyone can conse

rve water.
Chemistry
1 answer:
crimeas [40]2 years ago
5 0

Answer:

It has become evident in recent years that established water policies, under the current laws and management regimes that have allowed a flourishing agriculture and economy in the Southwest, are not appropriate to the challenges facing water demand in the 21st century. Yet only limited institutional and policy steps have been taken to develop new tools and approaches addressing these challenges. The circumstances listed below illustrate some of the more important unsustainable aspects of water use in the Southwest.

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20. What volume of 0.350M KMnO4 solution must be diluted to prepare 600. mL of
Dafna1 [17]

Answer:

25.7 mL

Explanation:

Step 1: Given data

  • Initial volume (V₁): ?
  • Initial concentration (C₁): 0.350 M
  • Final volume (V₂): 600 mL
  • Final concentration (C₂): 0.150 M

Step 2: Calculate the volume of the initial solution

We have a concentrated solution and we want to prepare a diluted one. We can calculate the initial volume using the dilution rule.

C₁ × V₁ = C₂ × V₂

V₁ = C₂ × V₂ / C₁

V₁ = 0.150 M × 600 mL / 0.350 M

V₁ = 25.7 mL

3 0
3 years ago
Please answer the “(fill-in)” ones thank you :)
Dovator [93]

Answer:

look

Explanation:

diffculte ou my good i need help too

8 0
3 years ago
Please help, I'm confused and it's due very soon!
ryzh [129]

Answer:

1. Lanthanum-139 atom is the stable isotope of lanthanum with relative atomic mass 138.906348, 99.9 atom percent natural abundance and nuclear spin 7/2.

2. In fact, over 80% of electric cars sold globally utilized permanent magnet-based motors in 2019. These magnets are typically made with rare-earth materials such as neodymium and dysprosium, which have a very geographically constrained supply chain.

3. It is the second most reactive of the rare-earth metals after europium. Lanthanum oxidizes in air at room temperature to form La2O3. It slowly reacts with water and quickly dissolves in diluted acids, except hydrofluoric acid (HF) because of formation of a protective fluoride (LaF3) layer on the surface of the metal.

Explanation:

3 0
3 years ago
If China has a population of 1,355,935,022 people and an area of 3,705,405 mi2028-02-04-03-00_files/i0160000.jpg, what is the po
mote1985 [20]
The correct answer is D.) 366 people/mi
4 0
3 years ago
An "extensive property" is a material property that depends on the amount of material present in a sample. An "intensive propert
TEA [102]

Answer: Rate of reaction is an "extensive property". Rate of generation of a chemical species is an "intensive property"

Explanation:

  • Let´s check out the Factors that affect the speed of reactions:

Temperature, Physical state of the reagents, Presence of a catalyst, Pressure, light, Concentration of the reagents.

When having a general chemical reaction like this:

aA + bB → cC + dD

Usually the rate of reaction is represented by the next equation

Rate = k [A]^{x} [B]^{y}

Where k= constant

x, y = reactant orders

A, B = reactant concentration

As we can see in the last equation, the rate of reaction <u>depends directly of the amount of material present</u> in a sample, that is why it is an "extensive property"

  • The rate of generation of a chemical species, depends of other factors like  Temperature, Presence of a catalyst, Pressure. As we can see all the factors that allow the speed of generation of a new chemical species let us know that this is an<u> </u><u>intensive property</u><u> because it doesn´t depends of the amount of material.</u>
7 0
3 years ago
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