Recent content by Grhymn

I also think there is missing something, but that's the whole question. Thank you for the help anyway

20mL/X=10mL so 2

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.

Because there wasn't enough NaOH, or because there is a dynamic equilibrium. I am not sure what kind of reaction this is (<=> or ->)

NaOH reacts with CO2 (I guess) -CO2+ 2NaOH -> Na2CO3 + H20

20 mL absorbed of the CO2 created by the first reacting absorbed and 35 mL remaining after the second reaction

I think the answer is CO2 for both questions

You are right, I meant the amount of CO2 after the first reaction.

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

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...

There were no constraints indeed. Thank you for the clarification.

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...

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?

I see, thank you!

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?