Describe how you would separate a mixture of charcoal, iron filings, salt, and water. what phases of matter are included in this mixture? (4 points)

This is heterogeneous mixture, the salt dissolves in water, charcoal and iron filings do not. There are three phases of matter (homogeneous solution od salt and water, iron and charcoal).

1) First separate iron filings by using the magnet, because iron is magnetic substance.

2) Then separate charcoal by filtration, passing the remaining mixture (water, salt, charcoal) through the filter paper.

3) Homogeneous solution of salt and water can be separated with heating (evaporating the water).

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

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