Next the students measured the density of aluminum metal. The accepted density for aluminum is 2.7 g/cm3. The students collected the following data. Trial 1 Trial 2 Trial 3 Mass (g) 18.34 g 18.35 g 18.34 g Initial volume (mL) 15.5 mL 16.0 mL 15.0 mL Final volume (with solid) 23.0 mL 22.5 mL 21.0 mL Volume of solid (mL= cm3) Calculated Density (g/cm3) Show a sample calculation for the density of the aluminum and complete the table above. Be sure to use units and correct significant figures.

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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