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SVEN [57.7K]
3 years ago
10

An embankment is best defined as __________. A. the process of cutting down all of the trees and plant life in an area, with no

care given to the sustainability of the forest B. the process of farming fish or other marine animals so they can be used as a food source C. a stretch of raised land, often built to help control flooding and the flow of a river D. gray or brown particles that cloud the air and that are caused by dust, smoke, or pollution Please select the best answer from the choices provided
Chemistry
2 answers:
jek_recluse [69]3 years ago
4 0

Answer:

C. A stretch of raised land, often built to help control flooding and the flow of a river.

Explanation:

Embankments are made typically of construction adjacent to the river from spoil excavated from its bank.

muminat3 years ago
3 0

Answer:

C. a stretch of raised land, often built to help control flooding and the flow of a river

Explanation:

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How many carbon atoms are in 7.05 moles of pyridine
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Determine el PH y el % de disociación de una solución de ácido débil, sabiendo que se disuelven 20 gramos del ácido (masa molar=
IceJOKER [234]

Answer:

pH = 4.27. Porcentaje de disociación: 0.03%

Explanation:

El pH de un ácido débil, HX, se obtiene haciendo uso de su equilibrio:

HX(aq) ⇄ H⁺(aq) + X⁻(aq)

Donde la constante de equilibrio, Ka, es

Ka = 1.65x10⁻⁸ = [H⁺] [X⁻] / [HX]

Como los iones H⁺ y X⁻ vienen del mismo equilibrio podemos decir:

[H⁺] = [X⁻]

[HX] es:

20g * (1mol/55g) = 0.3636moles / 2.100L = 0.1732M

Reemplazando es Ka:

1.65x10⁻⁸ = [H⁺] [H⁺] / [0.1732M]

2.858x10⁻⁹ = [H⁺]²

5.35x10⁻⁵M = [H⁺]

pH = -log[H⁺]

<h3>pH = 4.27</h3>

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Reemplazando

5.35x10⁻⁵M / 0.1732M * 100

<h3>0.03%</h3>
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