The electronegativity of the following elements increases in the order a. C, N, Si, P b. N, Si, C, P c. Si, P, C, N d. P, Si, N, C

Total number of structural isomers of 
[Co(NH₃)₆][Cr(CN)₆]

Why is boiling point of Cesium higher than that of Rubidium

 

which isomer mentioned in (a) is water soluble and why?

A gaseous mixture contains CO2 and CO the mass of the mixture is 200g and they are presenting equal fraction of moles . Find the total no. of O-atoms present in the mixture.