1 kg of NaOH solution contains 4 g of NaOH . THE APPROXIMATE concentration of the solution is
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Concentration
= {mass of solute÷ mass of solution} × 100
= {4 ÷ 1000} × 100
= 0.4 percent
= {mass of solute÷ mass of solution} × 100
= {4 ÷ 1000} × 100
= 0.4 percent
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