d.
Because a <em>complete</em> ionic equation wants you to show everything participating in the reaction. Even if some are spectator ions that do not affect the final equation you still must include them and therefore c. could not be the answer.
Answer:
is dissociation constant and the value of 
is 4.98.
Explanation:
The pH of the solution = 2.95 M
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
![2.95=-\log[H^+]](https://tex.z-dn.net/?f=2.95%3D-%5Clog%5BH%5E%2B%5D)
![[H^+]=10^{-2.95}=0.001122 M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D10%5E%7B-2.95%7D%3D0.001122%20M)
..[1]
Concentration of unknown monoprotic acid = C = 0.1224 M
Initially
C 0 0
At equilibrium
(C-x) x x
The expression of a dissociation reaction can be written as;
![K_a=\frac{[A^-][H^+]}{[HA]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BA%5E-%5D%5BH%5E%2B%5D%7D%7B%5BHA%5D%7D)
![[H^+]=x =0.001122 M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3Dx%20%3D0.001122%20M)
( from [1])
The value of :
![pK_a=-\log[K_a]](https://tex.z-dn.net/?f=pK_a%3D-%5Clog%5BK_a%5D)
![=-\log[1.038\times 10^{-5}]=4.98](https://tex.z-dn.net/?f=%3D-%5Clog%5B1.038%5Ctimes%2010%5E%7B-5%7D%5D%3D4.98)
is dissociation constant and the value of is 4.98.
The nonmetals, as s class of elements contains both solids and gases at room temperature.
Some gases classed as nonmetals are : hydrogen, helium, oxygen, nitrogen, fluorine, neon, or radon and many others. An example of a solid that is a nonmetal is sulfur.
Answer:
Mode
Explanation:
The mode is the number that appears most frequently in a data set. A set of numbers may have one mode, more than one mode, or no mode at all. Other popular measures of central tendency include the mean, or the average (mean) of a set, and the median, the middle value in a set.
