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3 years ago

There are well over 100 __________________ that exist on Earth

Chemistry

2 answers:

Nezavi [6.7K]3 years ago

7 0

Answer:

species like plants, animals , human etc

joja [24]3 years ago

7 0

Answer:

Dogs, Chocolate, Tvs, Phones.

Explanation:

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Why is it possible to use physical properties to separate a mixture

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It just is because science is science and it's supposed to make sense

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3 years ago

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Which property of potential energy distinguishes it from kinetic energy?

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B. position.

Potential energy is associated with position.

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3 years ago

If you negate reaction 2 and combine the reactions, which substances do not cancel?

olya-2409 [2.1K]

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3 years ago

List of 10 strong bases and acids?

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3 years ago

Using the following standard reduction potentials, Fe3+(aq) + e- → Fe2+(aq) E° = +0.77 V Ni2+(aq) + 2 e- → Ni(s) E° = -0.23 V ca

lina2011 [118]

Answer: The above reaction is non-spontaneous.

Explanation:

For the given chemical reaction:

$Ni^{2+}(aq.)+2Fe^{2+}(aq.)\rightarrow 2Fe^{3+}(aq.)+Ni(s)$

Here, nickel is getting reduced because it is gaining electrons and iron is getting oxidized because it is loosing electrons.

We know that:

$E^o_{(Fe^{3+}/Fe^{2+})}=0.77V\\E^o_{(Ni^{2+}/Ni)}=-0.23V$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

$E^o_{cell}=-0.23-0.77=-1.0V$

Relationship between standard Gibbs free energy and standard electrode potential follows:

$\Delta G^o=-nFE^o_{cell}$

As, the standard electrode potential of the cell is coming out to be negative for the above cell. Thus, the standard Gibbs free energy change of the reaction will become positive making the reaction non-spontaneous.

Hence, the above reaction is non-spontaneous.

3 0

3 years ago