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12 December, 15:08

How many water molecules are created when 32 grams of oxygen react completely with 4.0 grams of hydrogen?

a. 2

b. 20

c. 6.02 * 1023

d. 1.2 * 1024

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Answers (1)
  1. 12 December, 16:59
    0
    1mole of O2 = 16 so 32 = 2moles

    2 moles of O2 would require 4moles of H2 = 4g

    therefore 2 water molecules are formed. (a)
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