For a solution with an [oh−] of 10−8 m, what would be the value of [h+] , ph and poh, respectively? 1. 106 m, 6, 8 2. 10−6 m, 6, 8 3. 10−6 m, 8, 6 4. 10−14 m, 6, 8 5. 10−6 m, 6, 14 6. 10−14 m, 8, 6

Q1)pOH
the hydroxide ion concentration can be used to calculate the pOH of the solution 
pOH can be calculated using the following equation 
pOH = -log[OH⁻]
pOH = -log (10⁻⁸ M)
pOH = 8
therefore pOH of solution is 8

Q2) pH 
by knowing the pOH value we can calculate the pH value
since
pH + pOH = 14
and pOH = 8
therefore pH = 14 - 8
pH = 6

Q3)
pH scale is used to determine how acidic or basic a solution is
knowing the pH value we can calculate hydrogen ion concentration 
pH = -log[H⁺]
[H⁺] = antilog(-pH)
[H⁺] = antilog(-6)
[H⁺] = 10⁻⁶ M

answer is 2. 10⁻⁶ M, 6, 8

Answer : option a) 84explanation :

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.