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3 years ago

What is most likely to happen to an abandoned strip mine over time?

Chemistry

2 answers:

Blizzard [7]3 years ago

8 0

Answer:

The strip is likely to partly recover, but never return to its original state.

Explanation:

Mine is an excavation to obtain substances useful to man, such as ores, fuel, water etc. Subdivision tunnels made (or natural) by miners inside underground mines are known as galleries. Because of their wealth in some resources needed by humanity, the mines are explored until their resources are exhausted and then abandoned. Ideally, miners will repair the damage done to mines, but this is not the case, and the mine eventually recovers on its own over time, but cannot return to its original state prior to human intervention.

jok3333 [9.3K]3 years ago

3 0

The strip is likely to partly recover, but never return to its original state.

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Which of the following is a heterogeneous mixture?

Deffense [45]

I think that the answer is B, but I may be wrong...

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3 years ago

What substances make up water?

ziro4ka [17]

A water molecule consists of three atoms; an oxygen atom and two hydrogen atoms, which are bond together like little magnets.

An iron pot is made up of only one substance, iron. Iron is an element classified as a transition metal

Iron. Elementsare pure substances that are made up of one kind of atom. Pizza is not an element because it is a mixture of many substances. Water is a pure substance, but it contains two kindsof atom: oxygen and hydrogen.

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3 years ago

Read 2 more answers

PLEASE HELP!!!!!!!!!!!!!!

Akimi4 [234]

Answser

i didnt do dis my mom has a answer key book

Explanation:

4 0

3 years ago

PLEASE ANSWER I AM BEGGING

TiliK225 [7]

Taking into account the definition of dilution:

you have to use 8.23 mL of a stock solution of 7.00 M HNO₃ to prepare 0.120 L of 0.480 M HNO₃.
If you dilute 20.0 mL of the stock solution to a final volume of 0.270 L , the concentration of the diluted solution is 0.518 M.

<h3>Dilution</h3>

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

Ci: initial concentration
Vi: initial volume
Cf: final concentration
Vf: final volume

<h3>Volume of stock solution</h3>

In this case, you know:

Ci= 7 M
Vi= ?
Cf= 0.480 M
Vf= 0.120 L

Replacing in the definition of dilution:

7 M× Vi= 0.480 M× 0.120 L

Solving:

Vi= (0.480 M× 0.120 L)÷ 7 M

<u><em>Vi= 0.00823 L= 8.23 mL</em></u> (being 1 L= 1000 mL)

Finally, you will need 8.23 mL of the stock solution.

<h3>Concentration of the diluted solution</h3>

In this case, you know:

Ci= 7 M assuming the stock solution is 7.00 M HNO₃
Vi= 20 mL= 0.02 L
Cf= ?
Vf= 0.270 L

Replacing in the definition of dilution:

7 M× 0.02 L= Cf× 0.270 L

Solving:

(7 M× 0.02 L)÷ 0.270 L= Cf

Finally, the concentration is 0.518 M.

Learn more about dilution:

brainly.com/question/13505906

brainly.com/question/6692004

brainly.com/question/11931563

brainly.com/question/16343005

brainly.com/question/24709069

#SPJ1

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1 year ago

What do chemists use percent yield calculations for in the real world?

STALIN [3.7K]

Answer:

C. To determine how efficient reactions are.

D. To determine how much reactant they need.

Explanation:

When you are doing a reaction, you are hoping for a percent yield to close of 100%. You make the reaction and determine how many product you obtain. If you know the percent yield of a reaction you can calculate the amount of reactant you need to obtain a determined amount of product.

Having this in mind:

A. To balance the reaction equation. false. To calculate percent yield you need to balance the reaction before. You don't use percent yield to balance the reaction

B. To determine how much product they will need. false. You determine how much product you obtain after the reaction. How much product you need is independent of percent yield

C. To determine how efficient reactions are. true. A way to determine efficience of a reaction is with percent yield. An efficient reaction has a high percent yield.

D. To determine how much reactant they need. true. If you know percent yield of a reaction you can know how many reactant you must add to obtain the amount of product you want.

8 0

3 years ago