The answer is c, carefully read over and highlight key words
Answer:
Excretion is the process of removing wastes from the body. Organs of the excretory system include the kidneys, large intestine, skin, and lungs.
The excretory system removes metabolic wastes from the body. The major organs of excretion are the kidneys, a pair of bean-shaped organs located below the liver. The kidneys filter blood and regulate water balance in the body
Although it has a negative charge, it will never accept a
H
+
to form
H
2
S
O
4
(sulfuric acid) . That is because sulfuric acid is a strong acid and completely disassociates in water.
Therefore, the sulfate ion (
S
O
2
−
4
) is the conjugate base of
H
S
O
−
4
.
Answer:
The pH of pure water at this temperature is 6.88.
Explanation:
Ionization constant of water = 
Water will dissociate into equal amount of hydronium and hydroxide ions
![[H_3O^+] = [OH^-]= x](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%5D%20%3D%20%5BOH%5E-%5D%3D%20x)
![K_w=[H_3O^+]\times [OH^-]](https://tex.z-dn.net/?f=K_w%3D%5BH_3O%5E%2B%5D%5Ctimes%20%5BOH%5E-%5D)
![K_w=1.7 x 10^{-14}=[H_3O^+]\times [OH^-]](https://tex.z-dn.net/?f=K_w%3D1.7%20x%2010%5E%7B-14%7D%3D%5BH_3O%5E%2B%5D%5Ctimes%20%5BOH%5E-%5D)
The pH of the solution is a negative logarithm of hydronium ions concentration.
The pH of pure water at this temperature:
![pH=-\log [H_3O^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%5BH_3O%5E%2B%5D)
The only chemical elements that form stable homonuclear diatomic molecules<span> at standard temperature and pressure (STP) are the </span>gaseshydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), and chlorine (Cl2<span>). The answer must be one of the abovementioned element.
38.00/2 = 19 g/mol
Therefore, the gas is fluorine since it has an atomic weight 19 g/mol.</span>
