I suspect this question should read "How long does a red blood cell live." A red blood cell lives for between 100 and 120 days. It takes 7 days for a new red blood cell to develop from stem cells. Stem cells are similar to base cells. They can also be seen as a general template from which specialized cells are made. Stem cells can be taken from a newborn baby's umbilical chord or extracted from an adult blood donor's blood.This
Answer : When ethylene is passed through alkaline KMnO4 solution 1, 2-Ethanediol is formed. The Purple color of KMnO4 decolorizes.
The ratios which are needed to determine the mass of oxygen produced from the decomposition of 10 grams of potassium chlorate are;
- 31.998 g O2 : 1 mole O2
- 3 mole O2 : 2 mole KClO3
- 112.55 g KClO31 mole KClO3
From stoichiometry;
- We can conclude that according to the reaction;
3 moles of oxygen requires 2 moles of KClO3 to be produced.
And from molar mass analysis;
- 31.998 g O2 is equivalent to 1 mole O2
- O2112.55 g KClO3 is equivalent to 1 mole KClO3
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<u>Answer:</u> The correct answer is Option A.
<u>Explanation:</u>
pH is defined as negative logarithm of hydronium ion concentration. It is basically defined as the power of hydrogen ions that are present in a solution.
Mathematically,
![pH=-\log[H_3O^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH_3O%5E%2B%5D)
pH of the solution = 9.11
Putting values in above equation, we get:
![9.11=-\log[H_3O^+]](https://tex.z-dn.net/?f=9.11%3D-%5Clog%5BH_3O%5E%2B%5D)
![[H_3O^+]=antilog(-9.11)](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%5D%3Dantilog%28-9.11%29)
![[H_3O^+]=7.8\times 10^{-10}](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%5D%3D7.8%5Ctimes%2010%5E%7B-10%7D)
Hence, the correct answer is Option A.
Answer:
In complete combustion, there is a sufficient supply of oxygen which is able to react with the burning hydrocarbon allowing the reaction products H2O and CO2 to be formed. In incomplete combustion there is a lack of oxygen so when heat is applied carbon monoxide is released.
