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Delvig [45]
3 years ago
14

A table has several directional compasses, several lengths of wire, a battery, an ammeter, a light bulb, a battery holder and a

rubber eraser.
A student is asked to create an electric motor. Looking at the materials provided, what other materials would they need?
Chemistry
1 answer:
prisoha [69]3 years ago
7 0
<span>A permanent magnet
Reactivate</span>
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What happens to the energy needed to remove an electron as the atomic number increases across a period?
lora16 [44]

Answer:

In general, the energy needed to remove an electron (the ionization energy) increases as the atomic number increases across a period.

Explanation:

Each additional proton increases the attraction between the nucleus and the electron.

Thus, it takes more energy to remove an electron as you add extra protons.

4 0
4 years ago
4 and 5 pls and thank uuu
PtichkaEL [24]

Answer:

4. -ol

5. cyclic ketone

Explanation:

biology stuff

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5 0
2 years ago
Glass of orange juice contain 0.90 dL of juice. How many milliliters of orange juice is that?
dlinn [17]
.90 dL is 90 mL because 1 dL is 100 mL
6 0
3 years ago
HELP!!!!
ale4655 [162]

Answer: Option (b) is the correct answer.

Explanation:

Since energy of reactants is less than the energy of products. Therefore, it means energy is absorbed during the reaction.

As the energy required to break the bonds in the reactants is greater than the energy released when products are formed.  

Therefore, it is an endothermic reaction.

Thus, we can conclude that the statement, it is endothermic because the energy required to break bonds in the reactants is greater than the energy released when the products are formed is correct.

5 0
3 years ago
Read 2 more answers
Which is the correct equilibrium constant expression for the following reaction? Fe2O3(s) + 3H2(g) --&gt; 2Fe(s) + 3H2O(g) Kc =
svetlana [45]

Answer:

The equilibrium constant Kc = [Fe]²*[H2O]³ / [Fe2O3][H2]³

Explanation:

Step 1: Data given

For the reaction aA + bB ⇆ cC + dD

the equilibrium constant Kc = [C]^c * [D]^d/[B]^b*[A]^a

Step 2: The balanced equation

Fe2O3(s) + 3H2(g) --> 2Fe(s) + 3H2O(g)

Step 3: Calculate the equilibrium constant Kc

Kc =  [C]^c * [D]^d/[B]^b*[A]^a

⇒with [C] = [Fe]

⇒ with c = 2

⇒with [D] = [H2O]

⇒with d = 3

⇒with [A] = [Fe2O3]

⇒with a = 1

⇒with [B] = [H2]

⇒with b = 3

Kc =  [C]^c * [D]^d/[B]^b*[A]^a

Kc = [Fe]²*[H2O]³ / [Fe2O3][H2]³

The equilibrium constant Kc = [Fe]²*[H2O]³ / [Fe2O3][H2]³

6 0
3 years ago
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