How many grams of 40% pure sodium hydroxide is dissolved in 0.5 M, 250

1.	How many grams of 40% pure sodium hydroxide is dissolved in 0.5 M, 250 ml NaOH solution?
Answer» 5 gm 2 gm 12.5 gm 4 gm Solution :MOLES of PURE NAOH = `0.5xx0.25=0.125` Weight = 5 gm 100 gm impure = 40 gm pure `? "le" 5 gm = 12.5 gm`

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