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March 27, 2017

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given the balanced equation:

2Al2O3(s)-->4Al(s)+302(g)
What is the total number of moles of O2 that are produced when 8.0 mol of Al2O3(s)are totally decomposed ?

please help me.

  • Chem - ,

    2Al2O3(s)-->4Al(s)+302(g)

    From the equation 2 moles of Al2O3 yields 3 moles of O2

    so
    From the equation 4 moles of Al2O3 yields 6 moles of O2

    so
    From the equation 8 moles of Al2O3 yields ?? moles of O2

  • Chem - ,

    so the answer is 2 moles ?

  • Chem - ,

    i meant 12* moles

  • Chem - ,

    wait is it 24 moles ?

  • Chem - ,

    Are you just guessing? Which answer are you going for and why?

  • Chem - ,

    It's 12 moles. Cross multiply 8x6= 48, and then 48/4= 12

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