Que cantidad de impurezas tendrá un anillo de 14 kilates que pesa 15 gramos

6.25 g  

Explanation:

Pure gold is 24K.

If gold is 14K, it is 14/24 pure.

The remaining 10/24 is usually some other metal added to the gold to give it desired properties.

In a 14K ring with a mass of 15 g, the mass of "impurities" is

10/24 × 15 g = 6.25 g

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

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