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It is important to differentiate the stoichiometric or empirical formula of a molecular substance from its molecular formula. The former expresses only the relative numbers of atoms present, in the simplest present ratio. As, the compound of stoichiometry P2O5 occupy P4O10 molecules. Molecular formulae would be used when they are known. On the other hand, in a solid where clear molecular or other units do not exist the empirical formula is usually used. As,
NaCl is an ionic substance and the formula does not apply that molecules are present.
When solids contain identifiable groups such as complex ions or molecules the formula.
general principle on metelurgy
potential sources of error associated with coulometric titrations
In electrochemical series moving down the table the ease of discharge at cathode increases.why? And what is ease of discharge
what compounds is used to to change single bonded octane into double bounded high octane
Classification of proteins - Conjugated proteins The molecules of conjugated proteins are made up of simple proteins and non protein material. The non-protein material is known
Explain ,Why NH 4 + ion doesnot form complexes? solution) NH 4 + Ion does not act as ligand because nitrogen atom has no lone pair of electrons which it can donate to metal a
Composition of hydrocarbon (i) Alkanes: found 30 to 70% consist of upto 40 carbon molecule. Alkanes are mainly linear chain but some are branched chain isomers. (ii) Cycloal
How many unpaired electrons are present in Ni 2+ cation (atomic number = 28): (1) 0 (2) 2 (3) 4 (4) 6 Ans: 2
A cubic solid is made of two elements X and Y. Atoms V are at the corners of the cube and X at the body centre. What is the formula of the compound?
Sources of aliphatic hydrocarbon Mineral or crude oil, petroleum is the dark colour oily liquid along with offensive odour found at several depths in many regions below the sur
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