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Big Encyclopedia. Chemistry
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Big Encyclopedia. Chemistry. Simple answers to difficult questions:
Can we weigh a molecule?
How did you create smokeless powder?
How did you get pure crystalline iodine for the first time?
How large is the mass of water molecules?
What are detergents?
What are elements?
What are the sizes of molecules?
What is acid?
What is air?
What is alcohol?
What is ammonia?
What is carbon?
What is chlorine?
What is helium?
What is metal?
What is neon?
What is nitrogen?
What is oxygen?
What is radium?
What is the main ingredient of the air?
What is the most common metal in the crust?
What is uranium?
What is written on the blackboard?
What positive role did alchemy play?
When did chemistry appear?
Which metal is liquid at room temperature?
Which of the chemical elements is the most dense?
Who was the only inhabitant of the Earth whose mailing address could be made up of the names of chemical elements?
Why does iron rust?
Why does silver tarnish?
Why is it D.I. Mendeleev who authored the discovery of the periodic law of chemical elements?
Why is the promethium element named for Prometheus titanium?
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