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Chemical energy

Explanation:

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When you turn the crank on a hand- crank flashlight, kinetic energy from your body turns the generator inside the flashlight. That kinetic energy is converted into potential energy and stored in the battery, which can then make the light bulb work.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l