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Calculate the force constant of CF4 and SiF4 and compare their relative strengths with each other. The heats of formation of CF 4 and SiF 4 are -1222 kJmol -1 and -1615
what is true about all rocks
Q. Explain important properties of energy? Properties of Energy There are two important laws that explain the important properties of energy: Conservation of Energy (
A covalent bond between two atoms is formed by which of the following: (1) Electron nuclear attraction (2) Electron sharing (3) Electron transfer (
#question.affect of solvent on rate reaction
Q. Determine the Number of neutrons? Isotopes of an element can as well be specified by writing the mass number of the isotope following a hyphen after the name of the element.
Lithium hydration energy
A student wishes to prepare 250ml of a 0.20mol/L solution of oxalic acid (COOH)2.2H2O. a) Calculate the amount (no.of moles) of oxalic acid required. b) Calculate the mass of oxali
The configuration 1s 2 2s 2 2p 5 3s 1 shows: (1) Excited state of O 2 - (2) Excited state of neon (3) Excited state of fluorine (4) Ground state of fluorine ato
Which one of the following explains light both as a stream of particles and as wave motion: (1) Diffraction (2) γ= h/p (3) Interference (4) Photoelectric effect
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