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GenaCL600 [577]
2 years ago
7

Why are chemical changes considered "unseen?"

Chemistry
2 answers:
hichkok12 [17]2 years ago
6 0
<span>Chemical changes are considered unseen because they occur at the atomic level, changing the actual structure of the thing. This is in comparison to a physical change, which is visible.</span>
Andrej [43]2 years ago
5 0
Chemical changes are considered unseen because they occur at the atomic level, changing the actual structure of the thing.
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What property of argon is uses in light bulbs?
otez555 [7]
<span>The filament of the light bulb will get very hot. This will encourage a chemical reaction with most gases that are surrounding that filament - and the result is that the filament burns out. If the filament is in air, it combines with the carbon of carbon dioxide in the air, and the filament disintegrates. But argon is an inert gas - almost nothing reacts with it. So the filament takes a very long time (theoretically infinity) to burn out. But the bulb cannot contain 100% argon: 99.9% is typical; the remaining 0.1% being air. The bulb manufacturers can control the 'life' of a bulb, based on that principle: they do not want their bulbs to last forever!</span>
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3 years ago
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the rate of disappearance of Br- at some moment in time was determined to be 3.5 x 10-4 M/s. What is the rate of appearance of B
ddd [48]

Answer:

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Step 2: Establish the appropriate molar ratio

The molar ratio of Br⁻ to Br₂ is 2:1.

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3 0
2 years ago
Usually hard but brittle<br> Ionic or covalent
aleksandrvk [35]

Answer:

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Hope this helped!

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3 years ago
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