The diagram represents the chemical reaction that occurs when propane combusts. :
+
C3H8 + 502
3CO2
+
4H20 + Heat and
light
Propane Oxygen Carbon
Water
gas
dioxide
In the reaction, for every molecule of propane, how many molecules of oxygen are used?

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

ok whats the question if not i cannot you i need question and need a thing to answer

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.