An imaginary element (Atomic weight 93.7140) has three naturally-occurring isotopes with isotopic weights of 92.9469, 93.2923 and 94.9030. The abundance of the lightest isotope is 42.38 %. What is the percentage abundance of the heaviest isotope?

Explanation:=∑×100isotope)ofAAbundance(%r=78.710.1311.1723.98524.98625.983100100100⎛⎞⎛⎞⎛⎞×+×+×⎜⎟⎜⎟⎜⎟⎝⎠⎝⎠⎝⎠= 18.876 + 2.5311 + 2.902 = 24.309∑×100isotope)ofAAbundance(%r,∑= sum ofExample 1

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

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