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3 years ago

- 20 points.

Chemistry

1 answer:

JulijaS [17]3 years ago

4 0

A reaction, such as this one, starts with a reactant. It needs to have activation energy in order to change to the product, as shown by the hump in the graph. At the top of the hump is the transition state. This is the point where, after enough energy, the reactant will turn into the product. This reaction is exothermic. Since the product has less energy than the reactant, it had to have released energy somehow, and that energy was released in the form of heat, which makes it exothermic. (Exothermic reactions release heat, vs. endothermic reactions which absorb heat).

Bonus: a catalyst can be used to lower the activation energy by giving the reaction a “kick start,” requiring less energy in the reaction for the reactant to turn into the product.

-Lemme know if I can do anything else!

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The overall equation for the electrolysis of aluminium oxide is:

Alex Ar [27]

941539.2 g of mass of oxygen is produced when 2000 kg of aluminium oxide is completely electrolysed.

<h3>What is electrolysis?</h3>

Electrolysis is the process by which electric current is passed through a substance to effect a chemical change.

The mass of aluminium oxide Al₂O₃ = 2000 kg = 2000 000 g

Molar mass of Al₂O₃ = 101.96 g/mol

no of moles = $\frac{mass }{ molar \;mass}$

no of moles of Al₂O₃ = $\frac{2000 000 g}{101.96 g/mol}$

no of moles of Al₂O₃ = 19615.4 mol

From the reaction:

4Al + 3O₂ ⇒ Al₂O₃

To determine the moles of O₂ in Al₂O₃:

Then;

19615.4 mol X $\frac{3}{2}$ mol of O₂ = 29423.1

The mass of oxygen now = 29423.1 × 32 g

= 941539.2 g

Hence, 941539.2 g of mass of oxygen is produced when 2000 kg of aluminium oxide is completely electrolysed.

Learn more about electrolysis here:

brainly.com/question/18734579

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2 years ago

Determine the amount of both hydrogen and oxygen in a 500mL sample of Water.

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3 years ago

the first three ionization energies of an element x are 590, 1145, and 4912 kj mol-1. what is the most likely formula of the com

joja [24]

<u>Answer:</u> The chemical formula is $XSO_3$

<u>Explanation:</u>

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The ionization energy equation for the given values follow:

$X(g)\rightarrow X^+(g)+e^-;E_I=590kJ/mol$

$X^+(g)\rightarrow X^{2+}(g)+e^-;E_I=1145kJ/mol$

$X^{2+}(g)\rightarrow X^{3+}(g)+e^-;E_I=4912kJ/mol$

From the values of ionization energy above, it can be seen that the ionization energy increases as every succeeding electron is removed.

Second ionization energy is a little higher than the first one but there is a huge amount of difference between the third and second ionization energy.

This implies that the ion formed during second ionization energy has a stable configuration and it requires a humongous amount of heat to release the third electron.

Hence, the ion formed will be $X^{2+}$

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An ionic compound is formed between the two ions and the chemical compound formed between the two will have a formula of $XSO_3$

Hence, the chemical formula is $XSO_3$

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