30. A sample of zinc oxide weighing 2.036 g is dissolved in 59.00 cm3 of a sulfuric acid solution, after which the excess acid is titrated with 10.30 cm3 of 1.0200 N. sodium hydroxide solution. Find the percentage of zinc oxide in the sample if 1 cm3 of sulfuric acid solution is equivalent to 1.185 cm3 of sodium hydroxide solution.

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