In a Ni-Cd battery, a fully charged cell is composed of nickelic hydroxide. Nickel is an element that has multiple oxidation states. Assume the following proportions of the states:Nickel ChargeProportions Found00.17+20.33+30.33+40.5-0.33 Determine the variance of the nickel charge. Please enter the answer to 3 decimal places.

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Asked Jun 12, 2019
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In a Ni-Cd battery, a fully charged cell is composed of nickelic hydroxide. Nickel is an element that has multiple oxidation states. Assume the following proportions of the states:

Nickel Charge

Proportions Found

0

0.17

+2

0.33

+3

0.33

+4

0.5-0.33

 

Determine the variance of the nickel charge. Please enter the answer to 3 decimal places.

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Expert Answer

Step 1

Let X be the nickel charge.

The provided info...

0
0.17
0.33
2
3
0.33
4
0.5-0.33=0.17
The variance of X can be calculated as:
Var (x) E(x)-E (x))
-Σxp-Σxp,
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0 0.17 0.33 2 3 0.33 4 0.5-0.33=0.17 The variance of X can be calculated as: Var (x) E(x)-E (x)) -Σxp-Σxp,

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