1. A class of compounds called sodium metaphosphates were used as additives to detergents to improve cleaning ability. One of them has a molecular mass of 612g/mol. Analysis shows the
composition to be 22.5% Na, 30.4%P, and 47.1%0. Determine the molecular formula of this
compound

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

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