Questions asked by Dr. Mamdouh Younes

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• For the production of hydrated salt such as Fe(NO3)2.6H2O on adding nitric acid to iron sulfides, which is preferable using concentrated or dilute acid?
  
• Which acid (or chemical) dissolves both Silver (Ag) and Gold (Au) {together}at the same time?
  
• Recently, I completed research study on the "Correlation between Magnetization and Crystal Structure of Metallic and non-Metallic Materials". The conclusion is that "There is no relationship at all". Do you have any comments?
  
• What is the name of the laboratory instrument for measuring the wave length of some radiation ?