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OpenStudy (anonymous):
If the concentration of a solution of NaOH is 4g/dm3 ,then what mass of NaOH is contained in 250 cm3 of this solution ?
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OpenStudy (anonymous):
dm3= 1000 cm3 its mean 1000 cm3 contain mass of NaOH = 4 g 250 cm3 contain mass of NaOH = 4/1000 X 250 = 1 g
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