In a mechanical coal-wash process a portion of the inorganic sulfur and ash material in the coal can be removed. A feed stream to the process consists of 73% coal, 11% ash, 11% sulfur and 5% water. The clean-coal side of the process consists of 88% coal,6% sulfur, 3% ash and 3% water. The refuse side consists of 32% sulfur with the remainder being ash coal and water. If 80metric tons/hour of clean coal is required, determine the feed rate necessary for the mined coaland composition of the refuse material.

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant

Why is the structure of molecule important to its function?

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.