Answer: I think you forgot to put the image up
Step by step explanation:
I would convert my years of age to months, to days, to hours to minutes and finally to seconds. By knowing these facts:
365 days = 1 years
1 day = 24 hours
1 hour = 60 minutes
1 minute = seconds
I would be able to solve it.
Explanation:
a) The presence of sulfate ions in a solution can be confirmed by the reaction of barium chloride in an acidic medium.
The balanced chemical equation of the reaction is shown below:
![BaCl_2(aq)+CuSO_4(aq)->CuCl_2(aq)+BaSO_4(s)](https://tex.z-dn.net/?f=BaCl_2%28aq%29%2BCuSO_4%28aq%29-%3ECuCl_2%28aq%29%2BBaSO_4%28s%29)
Hence, the white precipitate is barium sulfate and its formation with the ionic equation is shown below:
![Ba^2^+(aq)+SO_4^2^-(aq)->BaSO_4(aq)](https://tex.z-dn.net/?f=Ba%5E2%5E%2B%28aq%29%2BSO_4%5E2%5E-%28aq%29-%3EBaSO_4%28aq%29)
b) The presence of copper (II) ions can be confirmed by the following test:
Add potassium iodide solution to copper (II) solution.
Then a white ppt of cuprous iodide along with the liberation of iodine is observed and the entire solution attains brown color.
The chemical equation of the reaction is shown below:
![2CuSO_4(aq)+4KI(aq)->Cu_2I_2(s)+I_2(s)+2K_2SO_4(aq)\\](https://tex.z-dn.net/?f=2CuSO_4%28aq%29%2B4KI%28aq%29-%3ECu_2I_2%28s%29%2BI_2%28s%29%2B2K_2SO_4%28aq%29%5C%5C)
c)(i)Due to this reaction, the blue color of the solution becomes white.
Reddish-brown copper is deposited at the bottom of the container.
(ii)In this reaction, zinc is oxidized.
d) (i) Copper is produced at the cathode.
(ii)![Cu^2^+(aq)+2e^-->Cu(s)](https://tex.z-dn.net/?f=Cu%5E2%5E%2B%28aq%29%2B2e%5E--%3ECu%28s%29)
(iii) The reaction that takes place at the cathode is reduction.
Reduction is gaining of electrons.
Answer:
The ratio of atoms of potassium to atoms of oxygen is 2:1
Explanation:
As the equation given is :
<h3>
![4K + O_2 -----> 2K_2O](https://tex.z-dn.net/?f=4K%20%2B%20O_2%20%20-----%3E%20%202K_2O)
</h3>
The product formed is 2 moles of potassium oxide .
Amount of potassium atom in the potassium oxide is 2 atoms of potassium and amount of oxygen atom present here is 1 atom of oxygen .
But we have 2 moles of potassium oxide . So, the potassium and oxygen atoms will be multiplied by 2 .
Hence , we get 4 atoms of potassium and 2 atoms of oxygen .
Ratio of potassium to oxygen atoms is - 4:2
Therefore , 2:1
An amoeba is a single felled organism