When adding sugar to tea, it was observed that the sugar kept dissolving. When ice was added, some sugar settled to the bottom of the glass. The mixture is then considered to be.

What type of scientific model does the flow chart represent? (a chart of the scientific process) a. conceptual b. mathematical c. physical d. virtual

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 .

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond