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Number of grms NaOH present in 5 liters of millimolar solution is ____________
Correct Answer: 0.2
A millimolar solution is $$10^{-3}\text{ M}$$, so 5 L contains $$5 \times 10^{-3}$$ mol of NaOH. The mass is $$5 \times 10^{-3} \times 40 = 0.2\text{ g}$$.
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