20. What are the enzymatic mechanism using chymotrypsin model. (including close proximity and proper orientation, acid-base catalysis, covalent catalysis,
stabilization of transition state and decrease the reaction's AG.)

Light travels through space at 186,282 miles per second and it takes about 1.3 seconds for light to travel from the moon to earth. which of the following is the correct method of finding the distance, in miles, between the moon and earth? add 186,282 and 1.3 divide 186,282 by 1.3 multiply 186,282 by 1.3 subtract 1.3 from 186,282