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1 December, 18:24

Given the balanced equation: 2KClO3 - ->2KCl + 3O2

How many grams of KCl are produced by decomposing 1.5 mol KClO3?

molar mass KCl=74.6 g

a

111.9 g

b

72.5 g

c

15.0 g

d

85.2 g

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Answers (1)
  1. 1 December, 18:28
    +1
    Option a → 111.9 g

    Explanation:

    The reaction is this:

    2KClO₃ → 2KCl + 3O₂

    2 moles of chlorate decompose to 2 moles of chloride and 3 moles of oxygen. Ratio is 2:2.

    If I use 1.5 moles of chlorate I'll get the same moles of chloride by the decomposition.

    Let's convert the moles to mass: 1.5 mol. 74.6 g / 1mol = 11.9 g
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