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arlik [135]
3 years ago
14

Consider the reaction 2 A(g) ⇄ B(g) + C(g) K = 0.035 A mixture of 8.00 moles of B and 12.00 moles of C in a 20.0 L container is

allowed to reach equilibrium. What is the equilibrium concentration of A?
Chemistry
1 answer:
VMariaS [17]3 years ago
3 0

Answer:

52.37 moles.

Explanation:

The value of reaction quotient of a reaction when it has reached to the equilibrium is known as Chemical Equilibrium.

The equation of chemical equilibrium for the reaction mentioned in the question will be as follows -

K = \frac{[B][C]}{[A]^2}  Where, the entities in the large bracket denote the concentrations of respective species in the reaction.

Thus following this equation, the equilibrium concentration of reactant A will be -

A= \sqrt{\frac{[B][C]}{K} }

A=\sqrt{\frac{8\times12}{0.035 }  

A= 52.37 moles.

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Ymorist [56]

Answer:

Option A (0.043 g) is the correct answer.

Explanation:

Given:

= 43 mg

As we know,

1 \ mg = \frac{1}{1000} \ g

then,

⇒ 43 \ mg = \frac{43}{1000}  \ g

              = 0.043 \ g

Thus, the above is the correct alternative.

4 0
3 years ago
Сульфат железа (II) окисляется в кислой среде перманганатом калия до Fe2(SO4)3, т.е. окисляется. Запишите и приравняйте уравнени
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Answer:

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5 0
3 years ago
How many molecules are in 0.0740 mol NH3?
Mariana [72]

Number of molecules NH₃ = 4.45 x 10²²

<h3>Further explanation   </h3>

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mol of NH₃ = n = 0.074

So the number of molecules :

\tt N=n\times No\\\\N=0.0740\times 6.02\times 10^{23}\\\\N=4.45\times 10^{22}

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2 years ago
Why do you think the different heating process result in different softness or hardness of the steel? Think about what steel is
ale4655 [162]

Explanation:

Different heating process affect the microstructure of the steel in different ways. Thus, imparting different properties to the steel. For example, annealing is done is done to impart softness to steel, hardening is done to hardened the steel( eg: carburizing, nitriding, cyaniding) whereas tempering is done to improve the ductility of the steel.

Steel mainly contains iron and carbon. This percentage of carbon and iron decides the property of the steel. It is the % of carbon which is altered in different heating process that to obtained the desire microstructure in steel.

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3 years ago
The element in group 4 and period 3
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8 0
2 years ago
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