Oleum is also known as fuming sulphuric acid or Nordhausen acid. It has a chemical formula of H2S2O7, and can be formed by dissolving excess sulphur trioxide[?] into sulphuric acid. See sulphuric acid for more information.
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... for Germany to his brother Ferdinand while he concentrated on problems abroad.
He had been fighting with the Ottoman Empire and its sultan, Suleiman the ...