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3 years ago

Soils refers to natural material from the earth, but not artificial material (like AstroTurf or asphalt).

Chemistry

2 answers:

mojhsa [17]3 years ago

8 0

This question is true

Andreas93 [3]3 years ago

5 0

Answer:

True.

Explanation:

Soil refers to a layer of earth where vegetables and fruits grow, and where some insects, animals, fungus, and bacterias live. It is not made by the man, and it has a mixture of minerals and other organic components that make it special. In contrast, asphalt and Astroturf are made by the man with artificial materials.

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makvit [3.9K]

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An electrochemical cell is composed of pure nickel and pure iron electrodes immersed in solutions of their divalent ions at room

Andrej [43]

Answer:

0.758 V.

Explanation:

Hello!

In this case, case when we include the effect of concentration on an electrochemical cell, we need to consider the Nerst equation at 25 °C:

$E=E\°-\frac{0.0591}{n} log(Q)$

Whereas n stands for the number of moles of transferred electrons and Q the reaction quotient relating the concentration of the oxidized species over the concentration of the reduced species. In such a way, we can write the undergoing half-reactions in the cell, considering the iron's one is reversed because it has the most positive standard potential so it tends to reduction:

$Fe^{2+}+2e^-\rightarrow Fe^0\ \ \ E\°=0.440V\\\\Ni^0\rightarrow Ni^{2+}+2e^-\ \ \ E\°=-0.250V$

It means that the concentration of the oxidized species is 0.002 M (that of nickel), that of the reduced species is 0.40 M and there are two moles of transferred electrons; therefore, the generated potential turns out:

$E=(0.440V+0.250V)-\frac{0.0591}{2} log(\frac{0.002M}{0.40M} )\\\\E=0.758V$

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3 years ago

Which type of seismic waves produces the most severe ground movement?

Leto [7]

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Explanation:

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miss Akunina [59]

Answer:

True

Explanation:

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