Mass of barium is 137.327 g/mol. Mass of radium is 226 g/mol.
Hence, radium has more mass therefore it will have the greatest density at STP.
Hope this helps :)
To segregate p-tert-butylphenol after you have removed it into NaOH arrangement one would accelerate the p-tert-butylphenol by adding 3M HCl to the cooled arrangement until the point when it is acidic. At that point as the phenol isolates as an oil, one needs to cool the blend in an ice shower to encourage crystallization. The precious stones that are then framed are the p-tert-butylphenol which can be isolated from the arrangement by filtration utilizing the Hirsch pipe
Answer:
most rocks are a mixture of minerals
I know this isn't much use but I'd guess at either C or D