states of matter, Chemistry

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why are some liquids purified by distillation under reduced pressure

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The number of unpaired electrons in a chromic ion Cr 3+ (atomic number = 24) is: (1) 6        (2) 4        (3) 3        (4) 1 Ans: 3

Solutions, how can you prepare 20%(v:v),150ml ethanol solution

how can you prepare 20%(v:v),150ml ethanol solution

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