Is a molecule? А.
a substance made completely of the same type of
atoms that are NOT chemically bonded together
B.
the smallest part of a substance that is still that
substance with atoms chemically bonded together
(1st gets it right wins a burrito)

B. the smallest part of a substance that is still that substance with atoms chemically bonded together

Explanation:

Molecules are the small part of a substance with the atoms that are chemically bonded together. Hence, option (B) is the correct answer.

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

the answer is c.the valence of the atoms combine .