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MakcuM [25]
3 years ago
9

Which shows the order of decreasing atomic size?

Chemistry
1 answer:
dalvyx [7]3 years ago
6 0

Answer:

a

...............................

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If δh = -70.0 kj and δs = -0.400 kj/k , the reaction is spontaneous below a certain temperature. calculate that temperature.
Trava [24]
According to this formula, when:

ΔG = ΔH  - T*ΔS

when the reaction is thermodynamically spontaneous ΔG < 0 

∴ ΔH - T* ΔS = 0 

∴T*ΔS = ΔH

∴ T = ΔH / ΔS

when we have:

ΔH = -70KJ

and ΔS = -0.4 KJ/K

So by substitution:

T =  -70KJ /- 0.4

  =  175 K 

∴the certain temperature below which the reaction will be thermodynamically spontaneous is 175 K  
4 0
4 years ago
The image represents a typical temperate forest food web. Use the image to answer the following questions(s).
Nikolay [14]

Answer:

Answer is D

Explanation:

secondary consumers eat meat and manly eat the primary consumers

BRAINILEST PLEASE

3 0
3 years ago
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Which statement is true about A nickel-cadmium dry cell?
marusya05 [52]

Answer:

The cathode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.

4 0
2 years ago
Sulfuric acid is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that sulfuric acid can under
Dmitriy789 [7]

Answer:

H₂SO₄ (aq) + H₂O (l)  → HSO₄⁻ (aq) + H₃O⁺ (aq)

HSO₄⁻ (aq) + H₂O (l) ⇄  SO₄⁻²(aq) + H₃O⁺ (aq)           Ka

Explanation:

The sulfuric acid is a dyprotic acid.

It is a considered a strong acid but only the first deprotonation is strong.

Second deprotonation is totally weak

That's why we have equilibrium when it release the second proton.

Since a deprotonation is treated for a weak acid, the acid is considered not to completely dissociate, that's why the equilibrium

4 0
3 years ago
Describe two substances that are useful because of their viscosity
sp2606 [1]
Oil and Grease are examples of substances that are useful because of their viscosity.


Hope this help.
8 0
3 years ago
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