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3 years ago

A 520-gram sample of seawater contains 0.317 moles of NaCl. What is the percent composition of NaCl in the water?

Chemistry

2 answers:

agasfer [191]3 years ago

7 0

The answer is in the photo.

Lyrx [107]3 years ago

5 0

Answer:

3.56 %

Explanation:

Percent composition of NaCl = $\frac{mass of NaCl}{mass of sea water }$ x 100

Mass of sea water = 520 g

Moles of NaCl = 0.317 mol

Molar mass of NaCl = 58.44 g/mol

Mass of NaCl = moles of NaCl x Molar mass of NaCl

= 0.317 mol x 58.44 g/mol = 18.52 g

Percent composition of NaCl = $\frac{18.52 g}{520 g}$ x 100 = 3.56 %

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