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lutik1710 [3]
2 years ago
6

The basic principle of energy is:

Chemistry
1 answer:
nevsk [136]2 years ago
8 0

Answer:

3)  Neither created nor destroyed.  Only converted.

Explanation:

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When a car engine burns gasoline, the results of the reaction are similar to when cells burn glucose. both reactions release car
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the answer is heat. while a car is in idol, the tailpipe gets very hot, (motorcycle, car, etc.) this also produces h20 which you can see dripping out of the tailpipe.

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3 years ago
Why is gold foil used on sculptures
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The gold leaf (not foil) is to give a sculpture or a painting appeal. Without it, it would discolour quicker.The gold leaf can be easily removed if needed to be.

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3 years ago
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What part of the sun do we see from earth?
NISA [10]

Answer:

photosphere

Explanation:

photosphere

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Calculate the acid dissociation constant Ka of a 0.2 M solution of weak acid that is 0.1% ionized is ________.
mars1129 [50]

Answer: acid dissociation constant Ka= 2.00×10^-7

Explanation:

For the reaction

HA + H20. ----> H3O+ A-

Initially: C. 0. 0

After : C-Cx. Cx. Cx

Ka= [H3O+][A-]/[HA]

Ka= Cx × Cx/C-Cx

Ka= C²X²/C(1-x)

Ka= Cx²/1-x

Where x is degree of dissociation = 0.1% = 0.001 and c is the concentration =0.2

Ka= 0.2(0.001²)/(1-0.001)

Ka= 2.00×10^-7

Therefore the dissociation constant is

2.00×10^-7

7 0
3 years ago
How do you know a physical change has occurred when evaporating water produces gaseous water?
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