Given the following equation Fe2O3 + 3H2 → 2Fe + 3H20
a. How many moles of H2O will be if 9.63 grams of Fe2O3 reacts with Hz?
b. How many grams of Fe will be produced if 0.59 moles of H2 react with Fe2O3?
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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.