chromium has four naturally occurring isotopes; cr-50, cr-52, cr-53, and cr-54. if the average atomic mass of chromium is 51.996 amu, which isotope of chromium is found in the greatest abundance?

Consider a normal distribution of frog weights with u = 500 grams and o = 65 grams. a sample of size 2,000 is drawn from this population. approximately how many of the 2,000 cases would you expect to find between 435 and 565?