0.05 moldm-3
0.30 moldm-3
0.50 moldm-3
0.40 moldm-3
Correct answer is C
2g NaOH is contained in 100cm3 Xg NaOH is contained in 1000cm3 Xgram = 2×1000100 = 20g Mole = 2040 = 0.50mol/dm3
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