Chemistry

Question

atomic weight of Na is 23
atomic weight of Cl is 35
what is the percentage of sodium in NaCl?​

1 Answer

  • Answer:

    [tex]\large \boxed{40\, \%}[/tex]

    Explanation:

    1. Calculate the molar mass of NaCl

     Na = 23 g

      Cl = 35 g

    Tot. = 58 g

    2. Calculate the mass percent of Na

    [tex]\text{\% of element} = \dfrac{\text{mass of element}}{\text{mass of compound}} \times 100 \, \% = \dfrac{\text{23 g}}{\text{58 g}} \times 100 \, \% =\mathbf{40\, \%}}[/tex]

    [tex]\text{The percentage of Na in NaCl is $\large \boxed{\mathbf{40\, \% }}$}[/tex]

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