Gabriella's teacher suggests that she use a strong solution of vinegar to kill the Weeds. Vinegar is acidic and prevents plants from maintaining homeostasis.
Gabriella sets up a controlled experiment to test her hypothesis that the solution
will kill the weeds without harming nearby vegetables. She plans to spray one
group of weeds with the solution and another group of weeds with water as a
control
What two variables should Gabriella keep the same between the control group of
weeds and the sprayed weeds to make sure that the spray has had an effect.
1
2.

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