Recent content by Grhymn

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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    I also think there is missing something, but that's the whole question. Thank you for the help anyway
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    20mL/X=10mL so 2
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    I see, so the gass at the end is the excess O2, this would mean that the volume CO2 after the first reaction = 20mL Molfraction=volumefraction for ideal gasses so if I am not mistaken : 20mL/X=2*VolumeH20/Y=10mL/1=VolumeO2/(X+Y/4) But I still don't get the formula out of this.
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    Because there wasn't enough NaOH, or because there is a dynamic equilibrium. I am not sure what kind of reaction this is (<=> or ->)
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    NaOH reacts with CO2 (I guess) -CO2+ 2NaOH -> Na2CO3 + H20
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    20 mL absorbed of the CO2 created by the first reacting absorbed and 35 mL remaining after the second reaction
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    I think the answer is CO2 for both questions
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    You are right, I meant the amount of CO2 after the first reaction.
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    Because at the end of the reaction after cooling there is 55mL gas, H20 is liquid then and I think you shouldn't take acount of the O2 in the 55mL
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    Empirical Formula of Hydrocarbon from Reacting 10mLCxHy with O2 and NaOH

    Homework Statement 10mLCxHy reacts with excess O2 After reacting and cooling until 298K the volume GAS = 55mL. Then NaOH is added and then the final volume of GAS = 35mL. Give the emperical formula of the hydrocarbon used in this reaction. Homework Equations -CxHy + (X+Y/4)O2 -> X...
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    Thermal Expansion: Square & Hole Expansion

    There were no constraints indeed. Thank you for the clarification.
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    Thermal Expansion: Square & Hole Expansion

    Homework Statement You have a square which has a hole inside. When the temperature increases how does it expand? Homework Equations The Attempt at a Solution I know that the hole will expand along with the square, but I don't see why. Can't it expand in both directions: the...
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    High School What factors affect the displacement range in Hooke's Law?

    I was told that Hooke's Law (F=-kx) only accounts for small displacements. But for some objects the displacement can be greater than with others. I was wonderinig which quality of the objects is responsible for this?
    • Grhymn
    • Thread
    • Displacement Hooke's law Law
    • Replies: 1
    • Forum: Mechanics
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    High School What Causes the Upward Force Counteracting Gravity?

    I see, thank you!
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    High School What Causes the Upward Force Counteracting Gravity?

    I get this, but I don't understand why the pressure must be the same in every direction. If you take a small cube in a fluid at rest, the net force must be zero. So pressure must be equal on opposite sites. But why does this mean that the horizontal pressure must equal to vertical pressure?