Which or the following solutions would have the highest concentration of hydronium ion and why? a)1.0×10^-3 m hcl b)1.0×10^-3 m hc2 h3 o2 c)0.050 m hcl d)0.050 m hc2 h3 o2 (i already know that the answer is c i just don't know why)

Answer is: C)0.050 M HCl.
Chemical reaction 1: HCl(aq) + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq).
Chemical reaction 2: CH₃COOH(aq) + H₂O(l) ⇄ H₃O⁺(aq) + CH₃COO⁻(aq).
Hydrochloric acid (HCl) is strong acid, which means that concencentration of hydronium ions are equal as concentration of hydrochloric acid:
A) c(HCl) = c(H₃O⁺) = 0.001 M.
C) c(HCl) = c(H₃O⁺) = 0.050 M is greater than A.
Acetic acid (CH₃COOH) is weak acid and does not dissociate completely as HCl, so concentration of hydronium ion in this solutions are very low.

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.