Identify the two main materials that can be found in the inner and outer core layers of the earth.
a) iron
b) rocks
c) oxygen
d) nickel
e) dead plants

A) iron and D) nickel

Explanation:

The inner and outer cores of the earth are made of nickel and iron. The pressure and temperature is so great that the iron in the inner core cannot melt!

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

answer///carbon;