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Q. Define Elements and Compounds? Pure substances are categorized into two categories that are elements and compounds. An element is a substance that can't be separated into
A covalent bond is likely to be formed between two elements which: (1) Have similar electronegativities (2) Have low ionization energies (3) Have low melting points (4
tie line explain in with the help of phase rule
The power plants at Geysers use a dry steam cycle. The steam enters the turbine at 250 o C and 30 bars represented by the point 1 in the steam h-s diagram here below. At the outlet
Filter A plant pot with a plug of cotton wool in the bottom and a layer of sand little inches deep makes a satisfactory filter for more purposes
Atomic emission spectrometry: In atomic emission spectrometry (AES), a reproducible and representative amount of the sample is introduced into an atomization-excitation source
Q. Define the Planck constant? The energy of a photon ( E photon) of a certain frequency (violet) is able to be calculated by using the following equation in which h represen
Which of the following has maximum number of unpaired electron (atomic number of Fe 26): (1) Fe (2) Fe (II) (3) Fe (III) (4) Fe (IV) An
cual es la formula para el calor especifico
The total number of valence electrons in 4.2 gm N-3 of ion is ( NA is the Avogadro''s number): (1) 1.6NA
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