WAEC - Chemistry (2008 - No. 15)

If 5.00cm3 of 0.20 mol dm-3Na2CO3 was diluted with distilled water to obtain 250 cm3 solution, what is the concentration of the resulting solution?
0.004 mol dm-3
0.02 mol dm-3
0.20mol dm-3
0.40mol dm-3

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