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abruzzese [7]
3 years ago
15

Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. what is helen most l

ikely trying to do?
Chemistry
2 answers:
Zanzabum3 years ago
4 0

Answer: Helen is trying to increase the current through an electric generator.

Explanation:

Electric generator is a device that converts mechanical energy to electrical energy.

The main functions of the armature are: To generate an electromotive force and to create a shaft torque in a rotating machine. By changing the number coils around an armature, the electric current can be increased or decreased.

In the given problem, Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. She is trying to increase the current through an electric generator.

Veseljchak [2.6K]3 years ago
3 0
Increase the amount of current

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Consider the reaction between iron (III) oxide, Fe2O3 and carbon monoxide, CO.
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<span>n(Fe2O3)=?
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<span>n(Fe2O3)=m(Fe2O3) / M(Fe2O3)
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5 0
3 years ago
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(1)<br> How many moles of iron can be made from 3 moles of Fe2O3?
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Be sure to answer all parts. Hydrogen iodide decomposes according to the reaction 2 HI(g) ⇌ H2(g) + I2(g) A sealed 1.50−L contai
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Answer : The concentration of HI and I_2 at equilibrium is, 0.0158 M and 0.00302 M respectively.

Explanation :

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\text{Concentration of }I_2=\frac{\text{Moles of }I_2}{\text{Volume of solution}}=\frac{0.00414mol}{1.50L}=0.00276M

\text{Concentration of }HI=\frac{\text{Moles of }HI}{\text{Volume of solution}}=\frac{0.0244mol}{1.50L}=0.0163M

Now we have to calculate the value of equilibrium constant (K).

The given chemical reaction is:

                            2HI(g)\rightleftharpoons H_2(g)+I_2(g)

Initial conc.      0.0163     0.00415      0.00276

At eqm.        (0.0163-2x) (0.00415+x)  (0.00276+x)

As we are given:

Concentration of H_2 at equilibrium = 0.00467 M

That means,

(0.00415+x) = 0.00467

x = 0.00026 M

Concentration of HI at equilibrium = (0.0163-2x) = (0.0163-2(0.00026)) = 0.0158 M

Concentration of I_2 at equilibrium = (0.00276+x) = (0.00276+0.00026) = 0.00302 M

8 0
3 years ago
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