Missing in your question :
Concentration by (M):
Xy: y: X
initial 0.2 0.3 0.3
change +X -X -X
equilibrim (0.2+x) (0.3-x) (0.3-x)
according to Kc formula: when Kc = 0.2
Kc = [XY]/[X]*[Y]
0.2 = (0.2+x) / (0.3-x)*(0.3-x)
0.2=(0.2+x) / (0.3-x)^2 by solving this equation
0.2*(0.3-x)^2 = 0.2+x
0.2* (0.09-0.6x+x^2)= 0.2 +x
0.0018 - 0.12 X +0.2X^2 = 0.2 + X
0.2X^2 -1.12 X -0.1982 = 0
∴X= 0.17
∴[XY] = 0.2 + 0.17 = 0.37 m
∴[X] = 0.3 - 0.17 =0.13 m
∴[y] = 0.3 - 0.17 = 0.13 m
Answer:
The Earth is a rotating sphere that orbits the Sun. The axis of rotation of the Earth is at a constant tilt with respect to its orbit around the Sun, thus resulting in the change of seasons. Iron and oxygen make up 65% of the Earth's mass. The Earth also has gravity and magnetic force fields.
Answer:
The list of strong, weak and non-electrolytes is given below from the examples listed in the question.
Explanation:
<u><em>A strong electrolyte </em></u>would completely or almost fully dissociate or in aqueous solution; strong acids and bases are generally examples,as well as salts. The following are strong electrolytes:
- Hydrochloric acid, HCl
- Calcium hydroxide, Ca(OH)2
- Potassium chloride, KCl
<em><u>A weak electrolyte</u></em> would only partly be ionized in solution; major examples are weak acids and bases. Examples of such include:
- Methylamine, CH3NH2
- Hydrofluoric acid, HF
<em><u>A non-electrolyte</u></em> will not dissociate in aqueous solution. The following are non-electrolytes:
- Sucrose, C12H22O11
- Methanol, CH3OH
Answer:
Average rate of decomposition = 3.68 x 10⁻³ mol/min
Explanation:
CH₃NC (g) → CH₃CN (g)
Average rate of decomposition = [CH₃NC]/Δt
[CH₃NC] = initial [CH₃NC] - final [CH₃NC]
[CH₃NC] = 0.200 mol - 0.108 mol
[CH₃NC] = 0.092 mol
Average rate of decomposition = 0.092 mol / 25 min
Average rate of decomposition = 3.68 x 10⁻³ mol/min
Na⁺,SO₄²⁻ is the answer
<h3>Further explanation
</h3>
An ion is an atom or molecule that has a net electrical charge. There are many ions, one of them are sodium ion and sulfate ion.
SO₄²⁻ or Sulfate is a naturally occurring polyatomic ion that consist of a central sulfur atom surrounded by four oxygen atoms with occured widely in everyday life. Sodium ions are important for regulation of blood and body fluids, transmission of nerve impulses, heart activity, and certain metabolic functions.
Whereas Na⁺ or Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sulfate ion is a very weak base. Therefore sulfate ion undergoes negligible hydrolysis in aqueous solution.
Enter the symbol of a sodium ion, Na⁺, followed by the formula of a sulfate ion, SO₄²⁻. Separate the ions with a comma only—spaces are not allowed. Express your answers as ions separated by a comma. Therefore the answer is: Na⁺,SO₄²⁻
Hope it helps!
<h3>Learn more</h3>
- Learn more about sodium ion brainly.com/question/6839866
- Learn more about sulfate ion brainly.com/question/2763823
- Learn more about ions brainly.com/question/11852357
<h3>Answer details</h3>
Grade: 9
Subject: Chemistry
Chapter: Introduction to Mastering Chemistry
Keywords: sodium ion, sulfate ion, ions, Chemistry, symbol
