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27 March, 16:47

Based upon the following equation: 2 K + 2 HCl - - > 2 KCl + H2 How many moles of K are needed to form 0.3 moles of H2? *

a) 0.15

b) 0.3

c) 0.6

d) 0.9

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Answers (1)
  1. 27 March, 17:12
    0
    From the given balanced chemical reaction it is signified that in every 1 mole of H2 will require 2 moles of K. Using the concept of ratio and proportion, with x being the number of moles of H2,

    2/1 = 0.3/x

    The value of x from the equation, 0.15 moles.
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