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5 Which of the following is an example of the Law of Conservation of Mass?
(A) slowly eating an ice cream to make it last as long as possible
(B) wind rustles leaves in a tree
(C) a cup of ice melts and liquid water remains
(D) someone picks up trash in their neighborhood

answer; i believe that the correct answer is (a) potassium(k)

i believe the answer is true.

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