See the answer A 1.35 g sample containing C, H, O, and N was burned in air, and 0.810 g H2O and 1.32 g CO2 resulted. In a separate reaction, 0.846 g of the compound reacted to form 0.395 g NH3. Find the empirical formula.

the correct answer would be d. hope this !

answer seismograph;

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.