Sulfur dioxide may be converted to SO3, which has many uses. A gas stream that has a composition of 10% SO2, 9% O2, and 81% N2 is to be passed through two reactor stages. The reaction conversion of the SO2 to SO3 in the first stage is 0.75 and in the second stage is 0.65. In order to boost the overall conversion to 0.95, some of the exit gas from the second reactor is recycled back and mixed with the inlet gas to the second reactor. If 100 moles are in the feed to the entire system, how many moles are in the recycle stream

i'm not sure

explanation:

i'll try whatever you got

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

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.