Calcium forms ions with a charge of +2. iodine forms ions with a charge of -1. which of the following would represent an ionic compound composed of calcium and iodide ions? options: cai2 cai ca2i ca2i 2cai cai2

Answer : The correct option is .

Explanation :

Ionic compound : It consist of a metal and non-metal. It is made up of ions that  gains or lose electrons and giving them a net positive and negative charge.

Metals have tendency to lose electrons easily, so they become cation which have a positive charge and non-metal have tendency to gain electrons, so they become anion which have a negative charge.

As we know that the Calcium forms ions with a charge of (+2) and Iodine forms ions with a charge of (-1).

Two iodide ion will require to combine with one calcium ion for a neutral compound.

Therefore, the correct representation of an ionic compound of Calcium and Iodide ions is .

The image is shown below.

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