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26 March, 14:55

How many grams of sodium chloride are required to prepare 500.0 ml of a 0.100 m solution?

a. 1.46 g strike reset

b. 2.93 g strike reset

c. 29.3 g strike reset

d. 58.5 g strike reset?

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Answers (1)
  1. 26 March, 17:58
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    Molarity is the number of moles of solute in 1 L solution.

    molarity of solution to be prepared is 0.100 M

    volume of solution to be prepared is 500.0 mL

    the number of moles in 1 L - 0.100 mol

    therefore number of moles in 500.0 mL - 0.100 mol/L x 500.0 x 10⁻³ L = 0.0500 mol

    mass of NaCl required - 0.0500 mol x 58.5 g/mol = 2.925 g

    mass of NaCl needed is therefore 2.93 g

    answer is B. 2.93 g
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