A sample of seawater contains 78.0 grams of NaCl in 2,025 mL of solution. If the molar mass of NaCl is 58.443 g/mol, what is the molarity of

Question

A sample of seawater contains 78.0 grams of NaCl in 2,025 mL of solution. If the molar mass of NaCl is 58.443 g/mol, what is the molarity of this sample?

0.659 M NaCl
0.823 M NaCl
1.84 M NaCl
2.08 M NaCl

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Cherry 3 years 2021-08-11T04:47:48+00:00 2 Answers 20 views 0

Answers ( )

  1. taiduc
    0
    2021-08-11T04:48:56+00:00
    Reply

    Answer:

    0.659 M NaCl

    Explanation:

    Equation: Molarity = moles of solute / liters of solution

    1. To find moles of solute:

    78.0 g NaCl x 1 mol NaCl / 58.44 g NaCl

    = 1.334 mol NaCl

    2. Calculate molarity

    Transfer 2,025 mL to L

    1.334 / 2.025 = 0.659 M NaCl (rounded)

  2. Sigrid
    0
    2021-08-11T04:49:43+00:00
    Reply

    Answer:

    that would be 0.659 M NaCl

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