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blsea [12.9K]
3 years ago
15

How much energy is released when 0.40 mol C6H6(g) completely reacts with oxygen?

Chemistry
2 answers:
podryga [215]3 years ago
6 0

Answer:

The right answer is -1268 kJ

Explanation:

Vsevolod [243]3 years ago
4 0
 <span>This question asksyou to apply Hess's law. 
You have to look for how to add up all the reaction so that you get the net equation as the combustion for benzene. The net reaction should look something like C6H6(l)+ O2 (g)-->CO2(g) +H2O(l). So, you need to add up the reaction in a way so that you can cancel H2 and C. 
multiply 2 H2(g) + O2 (g) --> 2H2O(l) delta H= -572 kJ by 3 
multiply C(s) + O2(g) --> CO2(g) delta H= -394 kJ by 12 
multiply 6C(s) + 3 H2(g) --> C6H6(l) delta H= +49 kJ by 2 after reversing the equation. 
Then, 
6 H2(g) + 3O2 (g) --> 6H2O(l) delta H= -1716 kJ 
12C(s) + 12O2(g) --> 12CO2(g) delta H= -4728 kJ 
2C6H6(l) --> 12 C(s) + 6 H2(g) delta H= - 98 kJ 
______________________________________... 
2C6H6(l) + 16O2 (g)-->12CO2(g) + 6H2O(l) delta H= - 6542 kJ 
I hope this helps and my answer is right.</span>
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MrRissso [65]

Answer:

Lathanum .

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Symbol = La

Atomic weight = 138.9

No of energy orbitals = 6

Electronic configuration

[Xe]6s^25d^1

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ASAP
Oksanka [162]

Answer:

Answer B

Explanation:

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Butoxors [25]

<u>Answer:</u> The total pressure of the container will be 2.00 atm

<u>Explanation:</u>

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PCl_5\rightleftharpoons PCl_3+Cl_2

By Stoichiometry of the reaction:

1 mole of PCl_5 produces 1 mole of PCl_3 and 1 mole of chlorine gas

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3 years ago
If a graduated cylinder has 28ml of water in it and you add an object which causes the water level to rise to 47ml, what is the
grin007 [14]

Answer:

The object placed in the water has a volume of 19 cm³

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<u>Step 1: </u>Data given

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The object placed in the water has a volume of 19 cm³

7 0
3 years ago
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