How many moles are in 25g of nacl? plz

The number of moles in 25g of NaCl is = 0.4moles.

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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the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.