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2 years ago

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Chemistry

2 answers:

LenKa [72]2 years ago

8 0

<u>Answer</u>:

the law of conservation of mass is valid for all the following, except nuclear reactions.

<u>Explanation</u>:

the law of conservation of mass is valid for all the following, except nuclear reactions because some mass gets converted to energy.

liubo4ka [24]2 years ago

3 0

Answer:

Nuclear reactions

Explanation:

What's this law?

This law states that in any chemical reaction the mass is neither created nor destroyed ,it remains conserved

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2 years ago

For the Zn - Cu^2+ voltaic cell Zn(s) + Cu^2+(aq, 1M) + Cu(s) E degree _cell = 1.10 V Given that the standard reduction potentia

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Explanation :

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The oxidation-reduction half cell reaction will be,

Oxidation half reaction: $Zn\rightarrow Zn^{2+}+2e^-$

Reduction half reaction: $Cu^{2+}+2e^-\rightarrow Cu$

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The overall balanced equation of the cell is,

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$E^o_{cell}=E^o_{(Cu^{2+}/Cu)}-E^o_{(Zn^{2+}/Zn)}$

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$1.10V=E^o_{(Cu^{2+}/Cu)}-(-0.76V)$

$E^o_{(Cu^{2+}/Cu)}=0.34V$

Hence, the value of $E^o_{(Cu^{2+}/Cu)}$ is, 0.34 V

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E = mc^2
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Help me┐(´ー｀)┌thank you in advance ​

Help me┐(´ー｀)┌thank you in advance