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Iron(III) oxide, also known as ferric oxide, has the chemical formula Fe₂O₃. To determine the percentage of iron in this compound, we need to calculate the mass of iron relative to the total mass of the compound. The molar mass of iron (Fe) is approximately 55.845 g/mol, while that of oxygen (O) is about 15.999 g/mol. In one mole of Fe₂O₃, there are two moles of iron and three moles of oxygen. Therefore, the total molar mass of Fe₂O₃ is (2 × 55.845) + (3 × 15.999) = 159.69 g/mol. The mass of iron in one mole of Fe₂O₃ is 2 × 55.845 = 111.69 g. To find the percentage of iron in Fe₂O₃, divide the mass of iron by the total mass of the compound and multiply by 100: (111.69 / 159.69) × 100 ≈ 69.9%. Thus, iron comprises approximately 70% of the mass of iron(III) oxide.
ISO Grade 32 oil is a classification within the International Organization for Standardization system that specifies the viscosity grade of industrial lubricants. Viscosity, which measures a fluid's resistance to flow, is a critical factor in the performance of lubricating oils. The numeric value 32 refers to the oil's kinematic viscosity in centistokes (cSt) at 40°C (104°F). Oils with ISO VG 32 are on the thinner side of the scale, making them suitable for applications requiring quick lubrication at lower temperatures or less resistance, such as in hydraulic systems, compressors, and turbines. The precise selection of oil within a specific ISO grade depends on the equipment’s requirements, operating conditions, and manufacturer recommendations to ensure optimal performance and longevity.
Titanium dioxide is typically utilized in a variety of processes. including ore mining and beneficiation. It is extracted from ilmenite. a heavy sand deposit rich in titanium. Next. the ilmenite is reduced to titanium tetrachloride using carbon in an electric furnace. The titanium tetrachloride then undergoes purification to remove impurities before being oxidized into titanium dioxide through either chlorination or the sulfuric acid method. Both methods involve reactions at high temperatures and different steps such as hydrolysis and calcination. The specific techniques used may vary depending on factors such as the mineral composition of the deposit. environmental considerations. and cost constraints.
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