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    Alkane X can be used as a fuel.

    Complete combustion of 0.0117 mol of X produces 2.00 × 10–3 m3 of carbon dioxide gas,measured at 24.0 °C and 101 kPa.

    Determine the molecular formula of X.Show all your working


    Thanks for the help
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    (Original post by _Lizabeth_)
    Alkane X can be used as a fuel.

    Complete combustion of 0.0117 mol of X produces 2.00 × 10–3 m3 of carbon dioxide gas,measured at 24.0 °C and 101 kPa.

    Determine the molecular formula of X.Show all your working


    Thanks for the help
    It's not help if we tell you the answer.

    What exactly are you having trouble with?

    Do you know how to work out the moles of gas using the ideal gas equation (which you have in the title)?
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    Convert to the correct units.
    What out number of moles using ideal gas equation
    Mr = mass/moles
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    Is heptane the correct answer?
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    (Original post by Ethan9133)
    Is heptane the correct answer?
    Yes
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    How many moles of CO2
    Spoiler:
    Show
    use formula
    What is Ratio of the moles of X to moles CO2
    Spoiler:
    Show
    Divide by smallest
    What is the formula of X
    Spoiler:
    Show
    1:7 thus, 7 C's in co2 thus, 7 C's in X and use alkane General formula for number of H's
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    (Original post by Ethan9133)
    How many moles of CO2
    Spoiler:
    Show

    use formula

    What is Ratio of the moles of X to moles CO2
    Spoiler:
    Show

    Divide by smallest

    What is the formula of X
    Spoiler:
    Show

    1:7 thus, 7 C's in co2 thus, 7 C's in X and use alkane General formula for number of H's
    How did you do the second part ?
 
 
 
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