Problems 40.24:7e sample of a compound composed of C, H,O, CI only, is burned in oxygen yielding 0.4964,
0 and 0.0864g of H20. A separate 0.1696g sample of the compound is fused with sodium meta
the product dissolved in water and the chloride quantitatively precipitated with AgNO3 to yiel
0.1991g cr AgCl. What is the empirical formula of the compound. (C6H502Cl).​

the answer is barium and copper bromide

more infor would

a lot

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.