Answer:
Decreasing order of strength of the the acids :
Explanation:
The strength of an acid is measured by their pH of aqueous solution.
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
![pH\propto \frac{1}{[H^+]}](https://tex.z-dn.net/?f=pH%5Cpropto%20%5Cfrac%7B1%7D%7B%5BH%5E%2B%5D%7D)
- Lower the pH more will be the hydrogen ions and stronger will be the acid.
- Higher the pH less will be the hydrogen ions and weaker will be the acid.
Solution of HX , has equal number of hydrogen ions as a that of its initial molecules o HX.
![[H^+]_x=[HX]](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_x%3D%5BHX%5D)
Solution of HY , molecules of hydrogen ions are half of the molecules of HY.
![[H^+]_y=\frac{1}{2}[HY]](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_y%3D%5Cfrac%7B1%7D%7B2%7D%5BHY%5D)
Solution of HZ , one quarter molecules of hydrogen ions and three quarter of the molecules of HY.
![[H^+]_z=\frac{1}{4}[HZ]](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_z%3D%5Cfrac%7B1%7D%7B4%7D%5BHZ%5D)
![[H^+]_x>[H^+]_y>[H^+]_z](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_x%3E%5BH%5E%2B%5D_y%3E%5BH%5E%2B%5D_z)
This means that HX is strongest acid followed by HY and then HZ.
Decreasing order of strength of the the acids :
Answer:
The temperature of the cold water is lower than the warm one. So, when we put the hand in the warm from the cold water, our hand will absorb heat, causing the hand to feel hot. Thus, we can conclude that the more heat it absorbs, the more hotter it is. Whereas the more heat it releases, the colder it is.
One way is for <span>a landowner to gather as much information as possible about his or her private water well, to know how it works, as well as who has had the land before them. The landowner needs to see if anyone has used pesticides in the area, as it can contaminate the well water. This is the most common way. The landowner can also check to see if any other chemicals have been spilt in the area or even a gas or oil leak, as that too can cause the contamination of well water.
I hope this helps.</span>
Answer:
The correct answer is option D.
Explanation:
A fuel cell is defined as the electrochemical cell which converts the chemical energy of a fuel (often used hydrogen) and an oxidizing agent (often used oxygen) into electrical energy via a pair of redox reactions.
The reactions which occur in hydrogen-oxygen fuel cell are:
At cathode: 
At anode: 
As we can see that reaction of hydrogen gas with oxygen gas gives us the water as a product which can be used for other things and it also doesn't pollutes environment.
Answer:
0.92% NaCl
Explanation:
To find the weight percent (aka. mass percent), you need to use the following equation:
mass of solute (g)
Mass Percent = --------------------------------- x 100%
mass of solvent (g)
In this case, NaCl is the solute and water is the solvent. You can plug the given values into the equation and solve for the mass percent.
4.6 g NaCl
Mass Percent = ------------------------ x 100%
500 g H₂O
Mass Percent = 0.0092 x 100%
Mass Percent = 0.92%
