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a. How does vulcanization change the character of natural rubber?
b. Why are the numbers 66 and 6 put in the names of nylon-66 and nylon-6?
The difference among Threshold energy and average energy of the molecules is known as activation energy.
In early Greece, water was considered one of the four basic "elements" (earth, wind, and fire as the others) in the universe. With the discovery of more basic constituents, the ter
The α -particle scattering experiment of Rutherford concluded that: (1) The nucleus is made up of protons and neutrons (2) The number of electrons is exactly equal to number
Drying of Organic Substances- purification of organic compounds Several solids are dried first by pressing them gently in between folds of filter papers. Compounds that neither
biography on Cecil E Boord
The expression for Bohr's radius of an atom is: (1) r= n 2 h 2 / 4 Π 2 me 4 z 2 (2) r= n 2 h 2 / 4 Π me 2 z 2 (3) r= n2h2/4 Π me 3
what are chemical properties of haloarenes?
Principle underlying the quantitative analysis: In flame photometry, the thermal energy from flame is utilized to convert the analyte within gaseous atoms and then to excite t
does lowered pH of water affect dissolved oxygen?
what evidence is there that all cells have a common ancestor?
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