The number of moles in 25g of NaCl is = 0.4moles.
Calculation of moles:
The atomic mass of sodium ( Na) = 23g
The atomic mass of chloride(Cl)= 35.5g
Therefore the molecular mass of NaCl = 58.5g
That is to say, 1 mole of NaCl = 58.5g
Therefore, X mole = 25g
Cross multiple,
X moles = 25/58.5
X moles = 0.4moles
Therefore, the number of moles in 25g of NaCl is = 0.4moles.
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