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
nexus9112 [7]
3 years ago
10

Suggest 2 reasons why copper should not be disposed in landfill sites

Chemistry
2 answers:
lidiya [134]3 years ago
8 0
It's a reliable source to many of products and it's value is far to hight to simply abandoned
SIZIF [17.4K]3 years ago
6 0
Because it's a waste. And it's medal instead of disposing just reuse it and also it can affect people  Like high exposure of copper can be dangerous 
You might be interested in
Gallium is produced by the electrolysis of a solution made by dissolving gallium oxide in concentrated NaOH(aq). Calculate the a
UkoKoshka [18]

Answer:

m_{Ga}=0.550gGa

Explanation:

Hello!

In this case, since the applied current for the 50.0 mins provides the following charge to the system:

q=0.760\frac{C}{s}*50.0min*\frac{60s}{1min}=2,280C

As 1 mole of electrons carries a charge of 1 faraday, or 96,485 coulombs, we can compute the moles of electrons involved during the reduction:

n_{e^-}=2,280C*\frac{1mole^-}{96,485C}=0.0236mole^-

Then the reduction of Ga³⁺ to Ga involves the transference of three electrons, we are able to compute the moles and therefore the mass of deposited gallium:

m_{Ga}=0.0236mole^-*\frac{1molGa}{3mole^-}*\frac{69.72gGa}{1molGa}  \\\\m_{Ga}=0.550gGa

Best regards!

5 0
3 years ago
Technetium has a half-life of six hours. If you obtain 100g of a pure technetium sample, after 18 hours how much of the pure sub
IgorLugansk [536]

Answer:

After 18 hours, the amount of pure technetium that will be remaining is 12.5 grams

Explanation:

To solve the question, we note that the equation for half life is as follows;

N(t) = N_0 (\frac{1}{2} )^{\frac{t}{t_{1/2}}

Where:

N(t) = Quantity of the remaining substance  = Required quantity

N₀ = Initial radioactive substance quantity  = 100 g

t = Time duration  = 18 hours

{t_{1/2} = Half life of the radioactive substance  = 6 hours

Therefore, plugging in the values, we have;

N(t) = 100 (\frac{1}{2} )^{\frac{18}{6}} = 100 (\frac{1}{2} )^{3} =  \frac{100 }{8} = 12.5 \ grams

Therefore, after 18 hours, the amount of pure technetium that will be remaining = 12.5 grams.

6 0
3 years ago
Liquid alcohol will change to vapor when its temperature reaches the
Arte-miy333 [17]
When it reaches the boiling point. When a substance reaches their boiling point, they change from liquid state to vapor state. Alcohol has a boiling point of around 78°C, so when you heat liquid alcohol to that temperature, it'll change to vapor.
8 0
3 years ago
Iron has a density of 7.9 space straight g divided by cm cubed. How much mass is in a 10 space cm cubed sample of iron? Question
dezoksy [38]

Answer:

79 g

Explanation:

Density (d) of iron = 7.9 g/cm³

Volume of the iron (V) = 10 cm³

Mass of the iron (m) = ?

Solution:

Formula will be used

                            d = m/V

As we have to find mass so rearrange the above equation

                              m = dV . . . . . . . . . . . (1)

Put values in above equation 1

                         m = 7.9 g/cm³ x 10cm³

                         m = 79 g

So,

mass of iron = 79 g

6 0
3 years ago
The diagram below shows the PH values of several substances.
skelet666 [1.2K]

Answer:

Changes in colour of litmus paper.

  • Blue litmus turns red under acidic conditions.
  • Red litmus turns blue under basic conditions.

Noe

PH values:-

  • K=4
  • M=11

K is acidic as pH is <7

Hence K will change the colour of blue litmus paper.

#B

Examples of substances

  • K=Vinegar, Tomatoes.
  • M=Milk of magnesia,Soap
4 0
2 years ago
Other questions:
  • What are the advantages and disadvantages of using electrolysis?
    9·1 answer
  • Draw the lewis structure for c2h2 (whose skeletal structure is hcch). draw the molecule by placing atoms on the grid and connect
    13·1 answer
  • What is the third most common gas found in the air we breath?
    15·2 answers
  • The density of solid Ag is 10.5 g/cm3. How many atoms are present per cubic centimeter of Ag?
    13·1 answer
  • Volume in units of what?
    9·2 answers
  • A 0.4066 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl
    15·1 answer
  • Describe what Rutherford would have seen in his gold foil experiment if J.J Thompson's Plum Pudding model was completly accurate
    14·1 answer
  • Calculate the final temperature of 12.0 g of Argon (considered as an ideal gas) that is expanded reversibly and adiabatically fr
    12·1 answer
  • What is the specific heat of a metal if the temperature of a 12.5 g sample increases
    15·1 answer
  • Which of these structures is found in all types of plant and animal cells
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!