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Gwar [14]
3 years ago
14

A teenager is discovered in his bedroom by his mother when she comes in to wake him for school at 6 a.m. He is stiff and lividit

y is evident. If he said good night to her at 11 pm, what is the latest possible time he could have died?
A) 3 a.m.
B) 4 a.m.
C) 5 a.m.
D) 12 a.m.
Chemistry
1 answer:
Kryger [21]3 years ago
4 0

(I hope I am right.)


I think it would be 5 a.m.

Have a lovely day! ~Pooch ♥

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Solution:- The balanced equation for the combustion of glucose in presence of oxygen to give carbon dioxide and water is:

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From given info, 2803 kJ of heat is released bu the combustion of 1 mol of glucose. We need to calculate the energy produced when 3.00 moles of oxygen react with excess of glucose.

We could solve this using dimensional analysis as:

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We know that, 1kcal = 4.184kJ

So, 1401.5kJ(\frac{1kcal}{4.184kJ})

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Hence, 335 kcal of heat energy is produced by the use of 3.00 moles of oxygen gas.


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