1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
strojnjashka [21]
4 years ago
6

Why is it expensive to extract copper from the land by the traditional method?

Chemistry
1 answer:
riadik2000 [5.3K]4 years ago
6 0
It is expensive to extract copper from a contaminated land where the percentage of copper is low using the traditional method because the said method is energy extensive. Energy is a big portion of the cost in any plant. Having a contaminated land means that there are many waste elements than the useful portion of the land. Extracting the useful part requires more energy which results to higher costs. HOPE THIS HELPS!
You might be interested in
3 H2S + 2 HNO3 +35 + 2 NO + 4 H2O
Anettt [7]

Element Oxidized: S (S^(2-) --> S⁰)

Element Reduced: N (N^(5+) --> N(2+))

Oxidizing Agent: HNO3

Reducing Agent: H2S

3 0
3 years ago
The plot shows the absorbance spectra for solutions of caffeine, benzoic acid, and Mountain Dew® soda, each in 0.010 M HCl . A p
Aliun [14]

Complete Question

The diagram of the complete question is shown on the first uploaded image.

Answer:

a) The approximate absorbance of benzoic acid at 228 nm? : A = 0.8

b) The molar absorptivity(∈)

of benzoic acid at 228 nm? : ∈   =  1.12 * 10^{4} M^{-1} cm^{-1}

Explanation:

Looking at the absorbance spectra, we can see that the approximate absorbance of benzoic acid at 228 is 0.8.

mass concentration of benzoic acid = 8.74 \frac{mg}{L} =8.74 * 10^{-3} \frac{g}{L}

the molar concentration of benzoic acid = (mass concentration of benzoic acid) / (molar mass of benzoic acid )

 

molar concentration of benzoic acid = (8.74 *10^{-3} \frac{g}{L} ) /(122.12\frac{g}{mol} )

molar concentration of benzoic acid = 7.157 * 10^{-5}M

molar absorptivity (∈) of benzoic acid = (absorbance) /[ (molar concentration of benzoic acid ) × (path length) ]

 

 ∈    = (0.8) / [ (7.157 *10^{-5}M) ×(1.00 cm)]

        =  1.12 * 10^{4} M^{-1} cm^{-1}

     

5 0
3 years ago
These are the photos for part A
Alla [95]

Answer:

Explanation:

For part C, this should be what the graph looks like.

The reactants should have higher energy that the products so that it can release energy. Recall the reaction is N2 + 3H2 => 2NH3 + energy, making it exothermic. Apparently, you are supposed to adjust the energy diagram on the simulation so that 20% of the reactants become the products.  

6 0
3 years ago
Explain why the melting point of a solid is equal to the freezing point of it's liquid.​
Tomtit [17]

Explanation:

<h3>Because melting point and freezing point describe the same transition of matter, in this case from liquid to solid (freezing) or equivalently, from solid to liquid (melting). It is stuck on 0 ∘C during the entire melting or freezing process. None except melting is when you heat up and freezing when you cool down.</h3>

<h2>hope it helps.</h2><h2>stay safe healthy and happy.</h2>
4 0
3 years ago
Would the term light year- the distance light travel in a year, or 9.5 trillion km-be useful in a model of the solar system
muminat
Lightyears- definitely! <span />
7 0
3 years ago
Other questions:
  • Ag has an anomalous electron configuration. write the observed electron configuration of ag. express your answer in complete for
    9·1 answer
  • The radiative zone is the outer shell of the sun from which light energy is radiated. True False
    13·2 answers
  • What is the molarity of a solution containing 5.0 moles of kcl in 2.0 l of solution?
    11·2 answers
  • Distinguish betwn.<br> Metals s non-metais
    6·2 answers
  • Which of the following is an example of a buoyant force acting on a piece of
    13·1 answer
  • A typical person has an average heart rate of 75.0 beat in minutes calculate the given question how many beats does she have in
    6·1 answer
  • In the temperature part of the experiment, which antacid tablet dissolved the fastest? Which antacid tablet dissolved the slowes
    7·1 answer
  • Of what are table sugar and table salt examples?
    9·2 answers
  • .1 Write 'a' 'an' or 'the' where is necessary.
    12·1 answer
  • Select the correct image.<br> Which body part is vestigial in humans?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!