There is no detectable change in the quantity of matter during an ordinary chemical reaction.
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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Ozone
We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.
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Gas of rotten eggs
If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.
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The most expensive metal in the world
Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.
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Creating Malachite egg
One of the most interesting and obvious chemical experiments is the experiment on the interaction of copper sulfate and calcium carbonate. The latter is contained in the shell of a simple egg, but copper sulphate should be searched in a chemical reagent store. This experience is simple, but...
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Disproportionation Reactions
Redox reactions in which the oxidizing agent and the reducing agent are the same species.
Dermal toxicity
Adverse health effects resulting from skin exposure ot a substance.
Why do copper products change color, and what is the name of the process?
Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.
Moderator
A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.
Phase Diagram
Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.
Enthalpy
The heat content of a specific amount of substance, defined as E= PV.
Equivalence Point
The point at which chemically equivalent amounts of reactants have reacted.
Neutron
A neutral subatomic particle having a mass of 1.0087 amu.
Hydrolysis Constant
An equilibrium constant for a hydrolysis reaction.
Phosphoric Acid
H3P04, Colorless liquid or rhombic crystals, decomposes before it will boil. Used mostly in the metal etchant. Used in cleaning operations to remove encrusted surface matter and mineral scale found on metal equipment such as boilers and steam producing equipment. Also used to brighten metals and remove rust.
