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Nookie1986 [14]
3 years ago
6

please help me please

Chemistry
1 answer:
Musya8 [376]3 years ago
4 0

Answer:

Two advantages are: Its cheap and it is a renewable energy source. Two disadvantages are it's not windy everyday and it will take up a lot of space for windmills.

Explanation:

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You're provided with a bottle labled [CoCl2.6H2O] = 0.056 M in 4.60 M HCl. You heat a small volume of the solution in a hot wate
sweet [91]

Answer: Equilibrium concentration of [Cl^-] at 50^0C is 4.538 M

Explanation:

Initial concentration of CoCl_2 = 0.056 M

Initial concentration of Cl^- = 4.60 M

The given balanced equilibrium reaction is,

               COCl_2+2Cl^-\rightleftharpoons [CoCl_4]^{2-}+6H_2O

Initial conc.          0.056 M      4.60 M        0 M       0 M

At eqm. conc.     (0.056-x) M   (4.60-2x) M   (x) M    (6x) M

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[CoCl_4]^{2-}\times [H_2O]^6}{[CoCl_2]^2\times [Cl^-]^2}

Given : equilibrium concentration of [CoCl_4]^{2-} =x =  0.031 M

Concentration of Cl^- = (4.60-2x) M  = (4.60-2\times 0.031) =4.538 M  

Thus equilibrium concentration of [Cl^-] at 50^0C is 4.538 M

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3 years ago
A student drew a diagram of the quantum model of an atom, as shown. A small circle is shown. Six light gray spheres and six dark
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The diagram is incorrect because there is only a single type of particle at the center of the atom.

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The small circle at the centre of the sphere which contains six light gray spheres and six dark gray spheres represents the nucleus of the atom which is found at the centre of the atom.

The nucleus contains only one type of particle which is the proton. Hence the representation of two particles at the centre of the circle makes the model incorrect.

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