Answer:
Graphite (/ˈɡræfaɪt/), archaically referred to as plumbago, is a crystalline form of the element carbon with its atoms arranged in a hexagonal structure. It occurs naturally in this form and is the most stable form of carbon under standard conditions. ... Graphite is used in pencils and lubricants.
When 1 mole of Zn and 2 mole of O₂ reacts togethor, It will produce 1 mole of ZnO as O₂ is excess reagent and Zn will act as Limiting reagent and thus it limits the amount of product formed.
<h3>What is Limiting reagent ?</h3>
Limiting reagents are the substances that are completely consumed first in a chemical reaction.
Given ;
- Amopunt of Zn : 1 mole
- Amount of O₂ : 2 mole
Given equation ;
2Zn + O₂ --> 2ZnO
As according to given chemical equation,
2 moles Zn of reacts with 1 mole of O₂ to produce 2 moles of ZnO.
Therefore,
1 mole of Zn will require 0.5 mole of O₂.
But,
the given amount of O₂ is 2 mole which is excess
Hence,
Zn here will act as the Limiting reagent, According to which the amount of product formed will be decided.
Therefore,
If 2 mole Zn produces : 2 moles of ZnO (According to given balanced equation)
Thus,
1 mole of Zn will produce = 2/2 x 1
= 1 mole of ZnO
Hence, When 1 mole of Zn and 2 mole of O₂ reacts togethor, It will produce 1 mole of ZnO as O₂ is excess reagent and Zn will act as Limiting reagent and thus it limits the amount of product formed.
Learn more about Limiting reagent here ;
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Answer:
Hi, the statements given in the question (a and b) are combination of right and wrong answers. But i will split the statement a and b into necessary fragments.
Carbohydrates are quick source of energy relatively. That is the only correct statement in the question.
Explanation:
Carbohydrates are naturally occurring organic compounds containing carbon, hydrogen and oxygen with the general formula (Cx H2y Oy) or Cx (H2O)y. They can be classified into simple sugar or complex sugar.
Simple sugars can be further divided into Monosaccharides (e.g glucose, fructose and galactose) and Disaccharides (e.g sucrose and maltose).
Complex sugar can be referred to as Polysaccharides (e.g cellulose and starch)
The statement above that says carbohydrate contains carbon, hydrogen and nitrogen polymers is not correct.
Carbohydrates are not mostly monosaccharides. They also contain Disaccharides and Polysaccharides.
They are not the only source of fuel.
Answer:
The pH of the final solution is 0.16 .
Explanation:
The pH of the solution is defined as negative logarithm of hydrogen ion concentration in a solution.
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
Concentration of HCl = 0.16 M
HCl is a string acid .1 molar of HCl gives 1 molar of of hydrogen ions.
![[H^+]=0.16 M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D0.16%20M)
Concentration of 
= 0.52 M
Nitric is a string acid .1 molar of nitric acid gives 1 molar of of hydrogen ions.
![[H^+]'=0.52 M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%27%3D0.52%20M)
Total hydrogen ion concentration:
![[H^+]''=[H^+]+[H^+]'](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%27%27%3D%5BH%5E%2B%5D%2B%5BH%5E%2B%5D%27)
=0.16 M+0.52 M=0.68 M
The pH of the solution:
![\pH=-\log[H^+]''=-\log[0.68 M]](https://tex.z-dn.net/?f=%5CpH%3D-%5Clog%5BH%5E%2B%5D%27%27%3D-%5Clog%5B0.68%20M%5D)
pH = 0.16
The pH of the final solution is 0.16 .
The answer is C. <span>The density of the fluid is greater than the density of the object.</span>
