Which of the following statements would be correct if one mole of C2H2 was used in this reaction? (5 points)
One mole of oxygen was used in this reaction.
Five moles of oxygen were used in this reaction.
O Four moles of carbon dioxide were produced from this reaction.
Two moles of carbon dioxide were produced from this reaction.

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.