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1.5 pts) The Rf value of compound A is 0.29 when developed in petroleum either and 0.44 when developed in dichloromethane. Compound B has an Rf value of 0.45 in petroleum either and 0.69 in dichloromethane. Which solvent would be better for separating a mixture of compounds A and B. Briefly explain your choice. What is petroleum ether
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