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[1] Chemistry behind Permanent Hardness of water??

[2] Atomic number top or bottom

[3] Oxidation number of fluorine in HOF compound

[4] Hexanol stain

[5] Crook ink disappearing

[6] polymer and enzyme filtration

[7] How to derive the formula for ‘b’ in van der wall’s gas equation?

[8] Tea Tree Oil and Water Emulsifier

[9] What is the difference between atomic volume, atomic size and atomic radius?

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