Be sure to answer all parts. How many moles of Hz0or OH must you add to a liter of strong base solution to adjust its pH from
9.710 to 8.000? Assume a negligible volume change.
S
Guide
H30
x 10
moles of
OH

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.

answerca air mass;