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acetic acid acetone acid rain acids alcohol allotrope ammonia amorphous bases beryllium buckminsterfullerene bucky balls calcium chloride carbon carbon chemisty carbon dioxide carbonic acid CH3COOH CH4 citric acid CO2 Common formula copper sulfate diamond ethanol fructose galactose games glucose graphite H2O2 H2SO4 helium hydrogen hydrogen hydrogen peroxide Kursk lactose lithium maltose methane methanol organic chemistry oxygen periodic table physical change plaster propan-1-ol propan-2-ol propanol rusting sodium soot steel sucrose sugar sulfuric acid vinegar weak acid worksheets