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Fed [463]
3 years ago
9

The producer in an energy pyramid contains about 1,000 kcal of energy

Chemistry
1 answer:
xz_007 [3.2K]3 years ago
8 0

The corrects answer is 900 kcals

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Sveta_85 [38]

Answer:

it's C

Explanation:

because it exhaled the carbon dioxide

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2 years ago
As part of a chemical compound, which element consists of atoms that most strongly attract electrons of other atoms?
Aleksandr [31]

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urmom

Explanation:

urmom ............

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3 years ago
Compute the equilibrium constant,K, at 25 ∘C for the reaction between Ni2+(aq) and Zn(s), which form Ni(s) and Zn2+(aq)
ANEK [815]

Answer:

The answer to the question is;

The equilibrium constant,K, at 25 °C for the reaction between Ni²⁺(aq) and Zn(s), which form Ni(s) and Zn²⁺ is 2.04×10¹⁷.

Explanation:

The half reactions are as follows

Ni²⁺ (aq) + 2e⁻ -> Ni (s)

Zn (s) -> Zn²⁺ (aq) + 2e⁻

For the Ni²⁺/Ni system we have the potential given as -0.23V (Reduction)

For the Zn²⁺/Zn sytem, the potential is -0.76. Here however, we should note that the zinc is being oxidized and therefore the potential is positive, that is;

Zn/Zn²⁺ = 0.76

Therefore the voltage for the sum of the reactions on both sides of the process is

-0.23 V + 0.76 V = 0.53 V    

We then call upon the Nernst equation to calculate the equilibrium constant as follows

E⁰_{cell} = \frac{0.0592}{n} logK

Where:

E⁰_{cell} = Standard cell potential = 0.53 V

n = Number of moles of electrons = 2 moles of e⁻

K = Equilibrium constant

Therefore we have

0.53 V = \frac{0.0592}{2} logK

Therefore log K = 17.905

and K =   10^{17.9054} = 2.04×10¹⁷.

5 0
3 years ago
Read 2 more answers
Which of element has the most valence rings?
MArishka [77]

Answer:

Elements in the Group 18

Explanation:

8 0
2 years ago
Which of the following is true about the following lever?
ryzh [129]

Answer:

It will rotate counter-clockwise

Explanation:

Momentum is greater on the left side.

8 0
2 years ago
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