Question

How many moles of sodium chloride present in 250 mL of a 0.50 M NaCl solution?​

Answer 1

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♤ Given:

● V = Volume = 250 ml = 0.25 L

● M = Concentration = 0.5M = molarity

● n = Number of moles ???

◇ Molarity is the concentration of solution contains certain number of moles in certain volume

☆ M= n ÷ v

So, n = M×V

☆ n = 0.5× 0.25 = 0.125 mole

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