Question

calculate the molarity of a solution containing 5g of NaOH in 450ml of solution

Answer 1

molar mass of NaOH=40g per mole
no. of moles in 5g of NaOH=5/40=0.125
volume of solution=450mL=0.45L
molarity of solution=no.of moles of solute/volume of solution
                              =0.125/0.45
                              =0.277777777778=0.28(approx.)

Answer 2

molar mass of NaOH=40g per mole

no. of moles in 5g of NaOH=5/40=0.125

volume of solution=450mL=0.45L

molarity of solution=no.of moles of solute/volume of solution

                             =0.125/0.45

                             =0.277777777778=0.28(approx.)

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