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Given: A piece of iron weighing 85.65 g was burned in air. The mass of the iron oxide produced was 118.37 g.
1. Use the molar mass of iron to convert the mass of iron used to moles.
2. According to the law of conservation of mass, what is the mass of oxygen that reacted with the iron?
3. Calculate the number of moles of oxygen in the product.
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A 50.0-mL sample of 2.0 x 10-4 M CuNO3 is added to 50.0 mL of 4.0 M NaCN. Cu+ reacts with CN- to form the complex ion [Cu(CN)3]^2: [Cu(CN)3]^2- Cu+ (+) 3CN- K = 1.0 x 10^-9
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A dilute electrolyte solution is prepared by dissolving iron(III) chloride in water. It is found to have a freezing point
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