Atypical amount of 99mtc injected for medical imaging is 15.0mci. convert this to decays per second, also called becquerels (bq, the si unit of activity.\

Bq

Explanation:

Radioactivity is the phenomenon in which a less stable nuclei decomposes to a stable nuclei by releasing some radiations or particles like alpha, beta particles or gamma-radiations.

Radioactivity is measured in units of curie (Ci) or becqerels (bq).

1 millicurie = Curie

Thus 15 millicurie = Curie

1 Curie is equal to Bq

0.015 Curie = Bq

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole