Answer: Oxygen.
Explanation: The -ate is used for the ion that has the largest number of Oxygen atoms. The -ite would be used for the ion with the smaller amount of oxygen atoms.
Atomic mass of Potassium = Mass of 1 atom of Potassium = 39.1 amu
Then
Mass of 6.02 x 1023 atoms of potassium = 39.1 x 6.02 x 1023 amu
=
We already know that
1 mole = 6.02 x 1023 atoms
Also
Number of mole = mass in grams/ atomic mass
Then
Mass in gram = Number of mole x atomic mass
= (39.1 x 6.02 x 1023)/(6.02 x 1023)
= 39.1 g
The correct option among all the options that are given in the question is the third option or option "B".
B. The nucleus of an atom contains protons and neutrons.
The reaction for the formation of HI, at the given time, has a reaction quotient of 613.
What is the reaction quotient?
Reaction quotient is the ratio of the concentration of product and reactant raised to the stoichiometric power at a given time interval.
The chemical reaction for the formation of HI is given as:

The reaction quotient is given as:
![\rm Q=\dfrac{[HI]^2}{[H_2]\;[I_2]}](https://tex.z-dn.net/?f=%5Crm%20Q%3D%5Cdfrac%7B%5BHI%5D%5E2%7D%7B%5BH_2%5D%5C%3B%5BI_2%5D%7D)
The concentration of system at the time, t has been:
Hydrogen = 0.1 M
Iodine = 0.2 M
HI = 3.5 M
Substituting the values for reaction quotient:

The reaction quotient for the reaction is 613. Thus, option D is correct.
Learn more about the reaction quotient, here:
brainly.com/question/8205004