Question

what is the mass of sodium in 58.5g of nacl

Answer 1

NaCl $\rightarrow$ Na + Cl

1 mole of NaCl contains 1 mole of Na

Molar mass of NaCl = Mass of Na + Mass of Cl

Molar mass of NaCl = 23 + 35.5 = 58.5 g

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58.5 g of NaCl contains 23 g of Na and 35.5 g of Cl.