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27 March, 23:51

How many moles are in 123.0grams of KCIO4?

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Answers (2)
  1. 28 March, 01:20
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    Number of moles = mass / molar mass

    = 123 g / 242.0111 g/mol

    = 0.508 mol
  2. 28 March, 04:30
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    first ... lets calculate the molar mass of KClO4

    39+35.5+16*4

    39+35.5+64

    =138.5g/mol

    so that mean every mole have 138.5g ... got that?

    138.5g = 1mole

    123g=x mole

    123/138.5=x

    x=0.888mol
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