Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be synthesized using a two-step thermal process. in the first step, phosphorus and oxygen react to form diphosphorus pentoxide: (l)(g)(g) in the second step, diphosphorus pentoxide and water react to form phosphoric acid: (g)(l)(l) write the net chemical equation for the production of phosphoric acid from phosphorus, oxygen and water. be sure your equation is balanced.

Explanation:

The first step is:

Second step is:

Multiplying second step by 2, and adding both the steps, we get that:

Cancelling common species, we get that:

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.