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Morgarella [4.7K]

2 years ago

14

Use the periodic table to find the molar mass of

1 answer:

Naddika [18.5K]2 years ago

3 0

I can give you a clue of getting mass. if it is the atomic number is even multiply by 2 but if the atomic number is odd multiply by 2 and add 1

sodium atomic number = 11 so mass = 11*2 +1 = 23

oxygen. atomic number = 8 so mass = 8*2 = 16

carbon atomic number = 6 so mass = 6*2 = 12

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slava [35]

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Explanation: In cobalt-silver voltaic cell, one half of the cell consists of cobalt electrode immersed in $Co(NO_3)_3$ solution ( which means that $Co^{3+}$ are present in the solution) and other half of the cell consists of the Ag electrode immersed in $AgNO_3$ solution ( which means that $Ag^+$ is present in the solution)

The two electrodes are joined by the copper wire. The cobalt electrode acts as an anode and the silver electrode acts a cathode.

At anode, oxidation reaction takes place and at cathode, reduction reaction takes place.

At Anode : $Co(s)\rightarrow Co^{3+}(aq.)+3e^-$

At Cathode: $[Ag^+(aq.)+e^-\rightarrow Ag(s)]\times 3$

Net ionic equation: $Co(s)+3Ag^+(aq.)\rightarrow Co^{3+}(aq.)+3Ag(s)$

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