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The First Chemical Explosive

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Jacob was sitting with Mark contemplating the following exercise he should educate Mark. When he at long last idea of a point he said “I have enlightened you concerning war and the superpowers, solid traditions and incredible fights, hazardous weapons and atomic bombs, do you know the historical backdrop of the main substance unstable?”

photo via wikipedia
The invention of gunpowder, anonymous maker, Museum Plantin-Moretus (PK.OPB.0168.004)
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Changes in States of Matter

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I don’t get our meaning by ‘change of state’?

Change of a substance into another structure is called change of state. Model: Ice dissolves into water whenever warmed.

photo via wikipedia
The four common states of matter. Clockwise from top left, they are solid, liquid, plasma, and gas, represented by an ice sculpture, a drop of water, electrical arcing from a tesla coil, and the air around clouds, respectively.
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Pure Substances and Mixtures

 25,340 total views

What is matter?

Matter can be characterized as any substance that has latency, consumes space and has mass.

source youtube

How is matter grouped?

Researchers of the world characterize matter as strong, fluid or gas, yet there is one additionally fascinating approach to order it. Matter can likewise be named pure substances and blends.

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Oxygen Discovery

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When did we find we required oxygen for breath?

We can’t survive without oxygen… actually. Obviously, everyone realizes that. In any case, that wasn’t the situation in the mid-1700s. Individuals were unconscious of a substance called “oxygen” that bolstered breath.

photo via wikipedia
Joseph Priestley is usually given priority in the discovery.
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