What is the concentration of a solution (in parts per million) if 15 mg KNO3 are dissolved in water to make a total solution mass of 5.0 kg?

the answer is a. co2, this would be colder than the : )

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

the answer is 0.42 is that is an option. this question provides no info