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Mice21 [21]
4 years ago
9

What is the molar mass for Mn3O4?

Chemistry
1 answer:
Leviafan [203]4 years ago
6 0

Answer: 228.7g/mole

Explanation:

Molar mass of Mn3O4

This shows that,

There are 3Mn

And 4 oxygen

Molar mass of Manganese is 54.9

Molar mass of oxygen is 16

Molar mass of Mn304

=3(54.9)+4(16)

=164.7+64

=228.7g/moles

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Fe^{3+}(aq)+e^-\rightarrow Fe^{2+}(s)..[1]  

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Reduction potential of Fe^{3+} to Fe^{2+}=0.771 V

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E^o_{Pb^{2+}/Pb}=-0.126 V

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

E^o_{cell}=E^o_{red,cathode}-E^o_{red,anode}

Putting values in above equation, we get:

E^o_{cell}=E^o_{Fe^{3+}/Fe^{2+}}-E^o_{Pb^{2+}/Pb}

=0.771 V-(-0.126 )=0.897 V

The over all reaction : 2 × [1] + [2]

2Fe^{3+}(aq)+Pb(s)\rightarrow 2Fe^{2+}(s)+Pb^{2+}(aq)  

The standard cell potential of the reaction is 0,.897 Volts.

7 0
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