Question: 1 9 . ! What is meant by a 2 0 % w v solution of sodium hydroxide ( N a O H ) ?

19.! What is meant by a 20%wv solution of sodium hydroxide (NaOH)? How many (a) grams, (b) moles, of sodium hydroxide are contained in 30cm3 of this solution?
19.! What is meant by a 20%wv solution of sodium hydroxide

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