For problems 1-6, find the average atomic mass of the following mixtures of isotopes. Show your work for full credit. Iodine-127 (80%), Iodine-126 (17%), Iodine-128 (3%)

126.86

Explanation:

Iodine-127 (80%)

Iodine-126 (17%)

Iodine-128 (3%)

For a mixture of isotopes, the average atomic mass is obtained by summing the multiplication of the atomic mass and percentage composition of the individual isotopes. This is given as;

Average Atomic Mass =  ( 80 / 100 *   127)  +  (17 / 100 *  126)   +  (3 / 100   *   128)

Average Atomic Mass =  0.8  *  127   +   0.12  *  126   +  0.03  *  128

Average Atomic Mass = 101.6  + 21.42 + 3.84  = 126.86

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.