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Allushta [10]
3 years ago
9

Question 11 please HELP

Chemistry
1 answer:
Lena [83]3 years ago
6 0

The answer is A or B, I would put B.

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Is the dissolution of borax endothermic or exothermic.
Olin [163]

Answer: Endothermic.

Explanation: ...

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2 years ago
When testing for hydrogen gas in the laboratory a glowing splint is inserted into the gas which results in a pop sound. What is
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C. Exothermic reaction I guess
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Compounds A, B, and C react according to the following equation. 3A(g) + 2B(g) 2C(g) At 100°C a mixture of these gases at equili
Vedmedyk [2.9K]

Answer:

The value of Kc for the reaction is 3.24

Explanation:

A reversible chemical reaction, indicated by a double arrow, occurs in both directions: reagents transforming into products ( direct reaction) and products transforming back into reagents (inverse reaction)

Chemical Equilibrium is the state in which direct and indirect reactions have the same reaction rate. Then taking into account the rate constant of a direct reaction and its inverse the chemical constant Kc is defined.

Being:

aA + bB ⇔ cC + dD

where a, b, c and d are the stoichiometric coefficients, the equilibrium constant with the following equation:

Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }

Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients divided by the multiplication of the concentrations of the reagents also raised to their stoichiometric coefficients.

Then, in the reaction 3A(g) + 2B(g) ⇔ 2C(g),  the constant Kc is:

Kc=\frac{[C]^{2} }{[A]^{3} *[B]^{2} }

where:

  • [A]= 0.855 M
  • [B]= 1.23 M
  • [C]= 1.75 M

Replacing:

Kc=\frac{1.75^{2} }{0.855^{3}*1.23^{2}  }

Solving you get:

Kc=3.24

<u><em>The value of Kc for the reaction is 3.24</em></u>

8 0
3 years ago
In the process of eukaryotic pre-mRNA splicing, how is the lariat intermediate formed?
Aleks [24]

Answer:

C

Explanation:

The Eukaryotic pre-mRNA receives a 5' cap and 3'poly(A) tail before Introns are removed and the mRNA is considered ready for translation.

4 0
2 years ago
Balance the following chemical reaction. ____NaOH+____H2SO4 → ___Na2SO4+____H2O
kobusy [5.1K]
The balanced equation would be 2NaOH + H2SO4 → Na2SO4 + 2H2O
7 0
3 years ago
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