What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na=23, O=16, H=1]
- 0.05 moldm-3
- 0.30 moldm-3
-
0.50 moldm-3
- 0.40 moldm-3
The correct answer is: C
Explanation
2g NaOH is contained in 100cm3Xg NaOH is contained in 1000cm3
Xgram = \(\frac{2\times 1000}{100}\) = 20g
Mole = \(\frac{20}{40}\) = 0.50mol/dm3
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