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  • Calculating Sodium Content: A Step-by-Step Guide
    Here's how to calculate the mass of sodium (Na) in 7.6 grams of sodium chloride (NaCl):

    1. Determine the Molar Mass of NaCl and Na:

    * NaCl: (22.99 g/mol Na) + (35.45 g/mol Cl) = 58.44 g/mol

    * Na: 22.99 g/mol

    2. Calculate the Moles of NaCl:

    * Moles of NaCl = (mass of NaCl) / (molar mass of NaCl)

    * Moles of NaCl = 7.6 g / 58.44 g/mol

    * Moles of NaCl ≈ 0.130 mol

    3. Determine the Moles of Na:

    * The chemical formula NaCl indicates that there is a 1:1 mole ratio between sodium and sodium chloride. Therefore, the moles of Na are equal to the moles of NaCl.

    * Moles of Na ≈ 0.130 mol

    4. Calculate the Mass of Na:

    * Mass of Na = (moles of Na) * (molar mass of Na)

    * Mass of Na = 0.130 mol * 22.99 g/mol

    * Mass of Na ≈ 2.99 grams

    Therefore, there are approximately 2.99 grams of sodium in 7.6 grams of sodium chloride.

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