A 3 should be placed in front of the H2 to balance it, since the 2 in front of NH3 says there are 6 H atoms. However on the other side, there are only 2. If we add the 3, 3 x 2 = 6. Then it is balanced.
Answer:
Ka = 4.70x10⁻⁴M
Explanation:
The general dissociation of a weak acid, HX, is:
HX(aq) ⇄ H⁺(aq) + X⁻(aq)
And Ka is written as:
Ka = [H⁺] [X⁻] / [HX]
<em>Where [] represents the molar concentration in equilibrium of each specie.</em>
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The equilibrium is reached when X of HX is dissociate in X H⁺ and X X⁻, that is:
[HX] = 0.0129M - X
[H⁺] = X
[X⁻] = X
As pH = -log [H⁺]:
10^-pH = [H⁺] = X = 2.239x10⁻³M
Solving:
[HX] = 0.0129M - 2.239x10⁻³M = 0.01066M
[H⁺] = 2.239x10⁻³M
[X⁻] = 2.239x10⁻³M
Ka = [H⁺] [X⁻] / [HX]
Ka = [2.239x10⁻³M] [2.239x10⁻³M] / [0.01066M]
<h3>Ka = 4.70x10⁻⁴M</h3>
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Answer:
El ácido sulfúrico concentrado puede realizar una reacción de deshidratación con el azúcar de mesa. Después de mezclar, el color cambia de blanco a marrón y finalmente a negro. La expansión de la mezcla es el resultado de la vaporización de agua y CO2 dentro del contenedor.
Answer:
203.75 K
Explanation:
use the ideal gas law equation: PV=nRT, R being the constant 0.08206 L-atm/mol-K.
plug in the values given:
(7.6 atm) (11.0 L) = (5.0 mol) (0.08206 L-atm/mol-K) (T)
and solve for T!
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