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4 years ago

What did researchers at Virginia Tech try using to help reforest post-mining site soil?

Chemistry

1 answer:

Vikentia [17]4 years ago

5 0

Answer:

Researchers at Virginia Tech decided to try using biochar to help reforest the post-mining site soil. They got permission to apply a layer of biochar to a post-mining site before it was reseeded and replanted.

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2)a dish contains a blackish-yellow powder.when a magnet is moved over it black particles iron get stuck to the magnet and only

Andrei [34K]

A element mixture (key word: mixture) due to the mixture containing 2 different types of elements it can be said that it’s highly likely that the mixture was not a compound but instead of a mixture due to mixture meaning more than 1 material. Hopes this help!

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2 years ago

Typical organic compounds have high boiling points?

Solnce55 [7]

Yes they all have them

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4 years ago

The vapor pressure of liquid octane, C8H18, is 100 mm Hg at 339 K. A sample of C8H18 is placed in a closed, evacuated 537 mL con

JulijaS [17]

Answer:

the final pressure (108.03 mmHg ) inside the container at 339 K is more than the vapor pressure of liquid octane (100 mmHg) at 339 K.

Hence,

b. Some of the vapor initially present will condense.

e. Liquid octane will be present.

Explanation:

Given that;

The vapor pressure of liquid octane, C8H18, is 100 mm Hg at 339 K

Initial volume of the container, V1 = 537 mL

Initial vapor pressure, P1 = 68.0 mmHg

Final volume of the container, V2 = 338 mL

Let us say that the final vapor pressure = P2

From Boyle's law,

P2V2 = P1V1

P2 * 338 = 68.0 * 537

338 P2 = 36516

P2 = 36516 / 338

P2 = 108.03 mmHg

Thus, the final pressure (108.03 mmHg ) inside the container at 339 K is more than the vapor pressure of liquid octane (100 mmHg) at 339 K.

Hence,

b. Some of the vapor initially present will condense.

e. Liquid octane will be present.

6 0

3 years ago

Which statements about the reaction are true? Select all that apply. The reaction is exothermic The reaction is endothermic The

Digiron [165]

The statements true for the reaction are A, C, and E.

The potential energy diagram of the following reaction has been given:

$\rm CH_4\;+\;2\;O_2\;\rightarrow\;2\;H_2O\;+\;CO_2\;+\;891\;kJ$

The reaction has been given to form water and carbon dioxide, along with the release of 891 kJ of energy.

<h3>Statements for the reaction</h3>

The endothermic reaction is the type of reaction that absorbed the energy from the system, while exothermic reaction released energy in the system.

The given system has releasing 891 kJ of energy. Thus, it has been an exothermic reaction.

The equation has been representing the 891 kJ of energy as the product. Thus, it has been released in the reaction as product.

The potential energy graph has been representing that the energy of the reactant has been higher than the product.

Thus, the statements true for the reaction are A, C, and E.

Learn more about potential energy, here:

brainly.com/question/19448013

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3 years ago

Sodium-24 has a half life of 14.8 hours how much of a 260.1mg sodium -24 sample will remain after 3.7days?

IrinaK [193]

3 minutes read 1 page for 5 hours how many pages?

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3 years ago