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sweet [91]
3 years ago
10

Kendra and Jordan gather firewood. The wood is cool to the touch, but the campfire they make warms their hands. Which statement

about this situation is true?
A. The chemical energy in the wood and the oxygen is less than the thermal and light energy released.
B. The chemical energy in the wood and the oxygen equals the thermal and light energy released.
C. The process of burning creates energy.
D. Energy is conserved in all chemical changes except burning.
Chemistry
1 answer:
Free_Kalibri [48]3 years ago
6 0

Answer:

D

Explanation:

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5 0
3 years ago
URGENT! Consider the following decomposition reaction of ammonium carbonate ((NH4)2CO3):
dexar [7]
<span>Using PV=nRT to find the moles and then convert back.
</span><span>4x=.8944
</span><span>solve for x then use the pressure for lets say CO2 put that into PV=nRT then solve for n then convert over.
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<span>(.2236)(2)/(298*.08206) = .0183*96g/mol = 1.76g
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<span>For C:

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2 years ago
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laiz [17]

The answer is: II.The endpoint is recorded when the solution is dark red in color rather than light pink.

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If the the acid is spilled before titration, that does not make endpoint wrong and molar mass can be calculated.

In this example we can take acetic acid as carboxylic acid; basic salt sodium acetate CH₃COONa is formed from the reaction between weak acid (in this example acetic acid CH₃COOH) and strong base (in this example sodium acetate NaOH).  

Balanced chemical reaction of acetic acid and sodium hydroxide:  

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Neutralization is is reaction in which an acid (in this example vinegar or acetic acid CH₃COOH) and a base react quantitatively with each other.

8 0
3 years ago
The following is an example of which type of boundary?
kow [346]
I believe that it most likely would be D.
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Zielflug [23.3K]

Answer:

look at the picture above

5 0
3 years ago
Read 2 more answers
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