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Lunna [17]
3 years ago
7

What are the drawbacks of desalinating water?

Biology
2 answers:
Oksanka [162]3 years ago
7 0
For the desalination of salt water a draw back is that it's more costly than fresh water
stiv31 [10]3 years ago
6 0

Answer:

Explanation:

Desalinating water is the freshwater in which the whole salt content has been removed. It is obtained from removing the salt content of the sea water.

The following are the drawbacks of the desalinating process:

1. It is unfit for the purpose of consumption like freshwater obtain from rivers, lakes and ponds.

2. The water desalinating plant produces greenhouse gases which can contaminate or pollute the environment.

3. The process of desalination is costly, time and labor consuming.

4. The salt or brine obtain after this process when stored to any region can produce hazardous impact over the environment. This can kill vegetation and wildlife.

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Answer:

B. as the temperature increases, the kinetic energy of the particles increases

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What part of the nervous system is essential for it to work properly?
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Iron reacts with atmospheric oxygen to form iron oxide or ferric oxide. Look at the chemical equation for this reaction: Fe + O2
Ber [7]

ANSWER

The correct answer is A

<u>EXPLANATION</u>

From the equation Fe + O_2 \rightarrow Fe_2O_3


<u>L.H.S.</u>               


Fe = 1                        

O  =2      

                 

<u> R.H.S</u>

Fe =2


O  =3

Now, let try to balance the oxygen atoms first,

To do this, we know the Least Common Multiples of 2 and 3 is 6


To get 6 atoms of oxygen at L.H.S  multiply 2 by 3 and on the R.H.S, multiply 3 by 2



L.H.S.                        

O=2\times3=6      


R.H.S

O=3\times2=6  


This means that, 3 should be in front of O_2 at the L.H.S and 2 should come before Fe_2O_3 in the R.H.S of the equation


Now, we have


L.H.S.                        


Fe = 1                          

O  =  6                        

<u>R.H.S</u>

Fe =4

O  =6

The equation is still not balanced since Fe is not balance

 

The Least Common Multiple of  1 and 4 is 4

Which means that we need to multiply 1 by 4 at the L.H.S and 4 by 1 at the R.H.S



L.H.S.                        

Fe=1\times4=4      


R.H.S

Fe=4\times1=4  


We now, have



<u>L.H.S.   </u>                    

Fe= 4                          

O=6                        


<u>R.H.S</u>

Fe =4

O=6

Hence the balanced equation is

4Fe +3O_2\rightarrow 2Fe_2O_3




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