Chemical reaction:
2H2S (g) ⇄ 2H2(g) + S2(g)
The equilibrium constant is given by: Kc = [H2]^2 * [S2] / [H2S]^2 = 1.67 * 10^ -7
The initial concentration is 0.0125 mol / 0.500 L = 0.0250 M
Make a table showing the initial concentrations, the change and the final concentrations of each species
2H2S (g) ⇄ 2H2(g) + S2(g)
start 0.0250M 0 0
change - 2x +2x + x
end 0.0250 - 2x 2x x
Kc = (2x)^2 (x) / (0.0250 - 2x)^2
Kc = 4x^3 / (0.0250 - 2x)^2
To solve that equation in an easy way you can assume that 2x is << 0.0250, which leads to
Kc = 4x^3 / (0.0250)^2 = 1.67 * 10^ -7
=> x^3 = 1.67 * 10^ -7 * 0.0250 / 4 = 2.6 * 10 ^-11
=> x = 2.97 * 10^ -4 M
With this you can check that your assumption that x << 0.0250 is good and continue.
From the table you know that the concentrations at equilibrium are:
[H2] = 2x = 2 * 2.97 * 10 ^ -4 M = 5.94 * 10 ^ -4
[S2] = x = 2.97 * 10^ -4 M
I think it’s observation. But again I’m not sure.
Answer:
By definition, there are 6.022×1023 such molecules, or NA such molecules in ONE mole of water. And thus in such a quantity there are NA oxygen atoms, and 2×NA hydrogen atoms...and the mass associated with this numerical quantity of water molecules is approx. 18⋅g ...
Correct answer is 20 kJ; 50 kJ
potential energy is resting energy, that peak that's 75 kJ would be the kinetic energy
Answer:
Sulfuric acid (American spelling) or sulphuric acid (Commonwealth spelling), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H2SO4. It is a colorless, odorless and viscous liquid that is miscible with water.
Calcium nitrate is produced by applying nitric acid to limestone and then adding ammonia. It is known as a double salt, since it is comprised of two nutrients common in fertilizers which are high in sodium. The processed result also looks crystallized like salt.
Sucrose is common sugar. It is a disaccharide, a molecule composed of two monosaccharides: glucose and fructose. Sucrose is produced naturally in plants, from which table sugar is refined. It has the molecular formula C₁₂H₂₂O₁₁.
Explanation:
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