MINERAL CALCULATION 2. The majority of minerals such as silicates, oxides, carbonates, phosphates, sulfates, etc. are compound containing large amounts of oxygen. The analysis of such minerals are reported as percentage of oxides, rather than as percentages of metals. Table 1.1 given a percentage weight (\%) of gypsum. Calculate and determine chemical formula of gypsum. Table 1.1: Chemical analysis of gypsum. (20 marks)