Amysterious white powder could be powdered sugar (c12h22o11), cocaine (c17h21no4), codeine (c18h21no3), norfenefrine (c8h11no2), or fructose (c6h12o6). when 82 mg of the powder is dissolved in 1.50 ml of ethanol (d = 0.789 g/cm3, normal freezing point −114.6 ∘c, kf = 1.99 ∘c/m), the freezing point is lowered to −115.5 ∘c. what is the identity of the white powder?

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring

What’s the theoretical yield of solid lead

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .