Predict the diffusion coefficient of acetone (CH3COCH3) in water at 25°C and 50°C using the Wilke-Chang equation. The experimental value is 1.28x10-9 m2/s at 25°C. (Viscosity of water at 25°C is 0.8937x10-3 Pa. s and at 50°C, 0.5494x10-3 Pa. s. Molar volume of acetone is 0.074 m3/kgmol.)

Radioisotopes often emit alpha particles, beta particles, or gamma rays. the distance they travel through matter increases in order from alpha to gamma. each radioisotope has a characteristic half-life, which is the time needed for half of a sample of radioisotope to undergo nuclear decay. which quality is desirable for a radioisotope that is used for medical imaging of a specific organ? check all that apply. half-life of several years half-life of several days half-life of several seconds emission of gamma rays emission of alpha particles ability to be attached to a compound used by the body ability to pass through the body without being absorbed