Two masses exerting a force on each other is an example a.) kepler's law b.)heliocentric theory c.)universal law of gravitation d.)geocentric theory

It would be C. Have a great day!

yes it is balanced

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