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12 April, 13:03

How many grams of NaOH are needed to prepare 500 mL of a 1.0 M solution?

Question 5 options:

40 grams

20 grams

10 grams

1.0 grams

i got 20 grams is it right

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Answers (1)
  1. 12 April, 13:27
    0
    20 g

    Explanation:

    M (NaOH) = 23 + 16 + 1 = 40 g/mol

    500 mL = 0.5 L solution

    1.0 M = 1.0 mol/L NaOH

    1.0 mol/L * 0.5 L = 0.5 mol NaOH

    0.5 mol * 40 g / 1 mol = 20 g
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