(50 grams/ of rosin 20 grams of beeswax and 25 g of sheila are heated and metal pan to produce benzene soluble cement . calculate the percentage by mass of all the components of a cement
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CHEMISTRY
To make a benzene soluble cement, 60 g rosin is melted in an iron pot and 68 g beeswax and 12 g shellac are added. How much of shellac should be taken to make 35 g cement?
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