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Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The remaining 2% are natural minerals such as iron and sulfur. Consider a 84.7−g sample of sea salt. What is the mass of chlorine (from sodium chloride) in the sample?

Respuesta :

adairhernandez8
It should be 19.6 grams.
samueladesida43

The mass of Chlorine (from sodium chloride) in a 84.7−g sample of sea salt is 50.37g.

HOW TO CALCULATE MASS OF AN ELEMENT IN A COMPOUND:

  • The mass of an element in a compound can be calculated by dividing the molar mass of the element by that of the compound, then multiply with the mass of the compound.

  • Mass of element = (molar mass of element ÷ molar mass of compound) × mass of compound

  • According to this question, sea salt contains 98% sodium chloride, hence, a sea salt with mass of 84.7g will contain 98% × 84.7g = 83.006g of sodium chloride.

  • Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

  • Mass of Chlorine = (35.5/58.5) × 83.006

  • Mass of chlorine = 0.607 × 83.006

  • Mass of chlorine = 50.37g

  • Therefore, the mass of Chlorine (from sodium chloride) in a 84.7−g sample of sea salt is 50.37g.

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