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3 years ago

Which of the following is false?

2 answers:

8 0

Protoporphyrin is bound to an iron atom in its Fe² state, not Fe³. It would need hemin to be able to bind to an iron atom in a Fe³ state.

The answer is B.

kipiarov [429]3 years ago

4 0

The accurate answer is
b) Protoporphyrin is bound to a single iron atom in its Fe+3 state

Explanation:
Protoporphyrin is bound to a single iron atom in its Fe+2 state.

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Calculate ΔHo for the following reaction ussing the given bond dissociation energiesCH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)BOND

Mazyrski [523]

Answer:

The ΔH° for the following reaction is -794 kJ, hence exothermic reaction,

Explanation:

$CH_4(g) + 2O_2(g)\rightarrow CO_2(g) + 2H_2O(g) ,$ ΔH° = ?

We are given with:

$\Delta H_{O-O}=142 kJ/mol$

$\Delta H_{O=O}=498 kJ/mol$

$\Delta H_{H-O}=459 kJ/mol$

$\Delta H_{C-H}=411 kJ/mol$

$\Delta H_{C-O}=358 kJ/mol$

$\Delta H_{C=O}=799 kJ/mol$

ΔH° =

(Energies required to break bonds on reactant side) - (Energies released on formation of bonds on product side)

$\Delta H^o=(1 mol\times 4\times \Delta H_{C-H}+2 mol\times 1\times \Delta H_{O=O})-(1 mol\times 2\times \Delta H_{C=O}+2 mol\times 2\times\Delta H_{H-O})$

$\Delta H^o=(1 mol\times 4\times 411 kJ/mol+2 mol\times 1\times 498 kJ/mol)-(1 mol\times 2\times 799 kJ/mol+2 mol\times 2\times 459 kJ/mol)$

$\Delta H^o=-794kJ$

$\Delta H^o>0$ endothermic reaction

$\Delta H^o$ exothermic reaction

The ΔH° for the following reaction is -794 kJ, hence exothermic reaction,

4 0

4 years ago

The degree of polarity of diatomic molecules is directly related to the difference in _____.

antiseptic1488 [7]

Electronegativity of the two atoms is your answer

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4 years ago

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What is the symbol of the new atom? Also, is the atomic number 86?

katrin [286]

Answer:

Explanation:

Rn is the symbol for radon with the atomic number of 86

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3 years ago

What is the substance called that is being dissolved in a solution?

Anna [14]

Answer:

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Explanation:

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4 years ago

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Dmitry [639]

There would be less rabbits and more grass

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3 years ago

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