A gas is heated from 200 K to 312 K. The volume is increased from 15.0 L to 25.0 L. If the original pressure was 12 atm, what is the new pressure?

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explanation:

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