Question:
The formula of nickel oxide is Ni\(_{98}\)O\(_{100}\). What is the approximate percentage of Ni\(^{2+}\) in it?
The formula of nickel oxide is Ni\(_{98}\)O\(_{100}\). What is the approximate percentage of Ni\(^{2+}\) in it?
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When calculating the percentage of an element in a compound, ensure you use the molar masses of the elements and the correct stoichiometric coefficients.
Updated On: May 13, 2025
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The Correct Option is C
Solution and Explanation
The molar mass of Ni\(_{98}\)O\(_{100}\) is calculated by adding the molar masses of Ni and O. The percentage of Ni\(^{2+}\) can be calculated by dividing the mass of Ni by the total mass and multiplying by 100.
For Ni, with atomic mass 58.7, the mass of Ni in Ni\(_{98}\) is approximately 98 * 58.7, and the total mass is 98 * 58.7 + 100 * 16.
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