The function of the soap is to help wash off the oils. Because oil is hydrophobic, and soap is made of molecules that are both hydrophobic and hydrophilic, the soap molecules can connect to both oil and water. When the soap is combined with water and oil, it causes the oil to form small drops that can easily be washed off.
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Answer:
![[H_{3}O^{+} ] = 10^{-2}](https://tex.z-dn.net/?f=%5BH_%7B3%7DO%5E%7B%2B%7D%20%5D%20%3D%2010%5E%7B-2%7D)
mol/ L
Explanation:
Measure of [H₃O⁺] , i.e hydrogen ion concentration, indicates the acidity of the solution. The greater the concentration, the greater is the acidity. [H₃O⁺], this quantity can range from 10⁻¹ to 10⁻¹⁴ at ambient temperature(298K). This range is always temperature dependent.
Measure of acidity of a solution is expressed more conveniently using the notation of pH.
![pH = - log_{10}[H_{3}O^{+} ]](https://tex.z-dn.net/?f=pH%20%3D%20-%20log_%7B10%7D%5BH_%7B3%7DO%5E%7B%2B%7D%20%5D)
Using the above formula
![[H_{3}O^{+} ] = 10^{-(pH)}](https://tex.z-dn.net/?f=%5BH_%7B3%7DO%5E%7B%2B%7D%20%5D%20%3D%2010%5E%7B-%28pH%29%7D)
mol/ L
Answer:
Explanation:
Since the crystal structure is FCC , every unit cell will have 4 atoms . If a be the edge length
average density = 4 x average atomic no / volume of unit cell x N
N is avogadro no or 6.02 x 10²³
average atomic no
= 100 / (87/107.9 +13/106.4) = 107.72
average density = 100 / (87/10.49 + 13/12.02)
= 10.667
10.667 = (4 x 107.72 )/ (a³x 6.02 x 10²³)
a³ = 4 x 107.72 / (10.667 x 6.02 x 10²³)
= 6.71 x 10⁻²³
a = 4.063 x 10⁻⁸ m
Answer:
The mass of carbon dioxide formed is 12g.
Answer: Isotopes
Explanation:
The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses.
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