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3 years ago

Write the unbalanced chemical equation for the following reaction:

Chemistry

1 answer:

liq [111]3 years ago

5 0

N2 + H2 -> NH3
They both have 2s after them because they are both diatomic molecules

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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

EXPERIMENT 1: Identify the oxidation and reduction half-reactions that occur in

Hoochie [10]

Answer:

Cathode: Mn → Mn²⁺ + 2e⁻ (Oxidation)

Anode: Zn²⁺ + 2e⁻ → Zn (Reduction)

Mn | Mn²⁺ || Zn²⁺ | Zn

Explanation:

To identify the half reaction we need to see the oxidation states.

Mn(s) → Ground state → Oxidation state = 0

Mn(NO₃)₂ → Mn²⁺ → The oxidation state has increased.

This is the oxidation reaction. It has released two electrons:

Mn → Mn²⁺ + 2e⁻

Zn(NO₃)₂ → Zn²⁺

Zn → Ground state → The oxidation state was decreased.

This is the reduction reaction. It has gained two electrons:

Zn²⁺ + 2e⁻ → Zn

Cathode: Mn → Mn²⁺ + 2e⁻

Anode: Zn²⁺ + 2e⁻ → Zn

Mn | Mn²⁺ || Zn²⁺ | Zn

4 0

3 years ago

Would an earthquake support the principle of uniformitarianism or the principle of catastrophism? Explain.

liberstina [14]

Question: Would an earthquake support the principle of uniformitarianism or the principle of catastrophism? Explain.

Answer: Catastrophism was the theory that the Earth had largely been shaped by sudden, short-lived, violent events, possibly worldwide in scope. This was in contrast to uniformitarianism (sometimes described as gradualism), in which slow incremental changes, such as erosion, created all the Earth's geological features.

Hope this helps, have a good day. c;

3 0

3 years ago

How many electrons are in the highest occupied energy level of these atoms?

Yuliya22 [10]

Excuse me not giving an explanation; I haven't even learned chemistry before. I usually give explanations for math/english.

I think it would be for flourine: 7
aluminum: 8
can't help with the rest...
sorry!

8 0

3 years ago

An atom that has a negative four charge will have one of the following?

expeople1 [14]

B. An equal amount of protons and electrons

8 0

4 years ago

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