Helium (he) is the lightest noble gas component of air, and xenon (xe) is the heaviest. perform the following calculations, using r = 8.314 j/(mol·k) and ℳ in kg/mol. (a) find the rms speed of he in winter (0.°c) and in summer (30.°c). enter your answers in scientific notation.

What is the percentage composition of carbon in the compound ch4

Sugar is dissolved in water. which is the solute? sugar neither both water

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 .