I'm kinda stuck on this and my friend and I were debating over this.
Heptain and octane are found in gasoline. Heptane has a boiling point of 98 degrees and octane has a boiling point of 125 degrees. If a mixture of heptane and octane is distilled, what will happen?
A) Heptane will be the distillate. Octane will be the residue.
B) Heptain will be the residue. Octane will be the distillate.
C)Nothing will happen since heptanes (the s is prob. a spelling mistake) and octane cannot be separated by distillation.
D)Both the heptanes and he octane will become distillate.
E)Heptane will undergo a chemical change to form octane at higher temperatures.
Friend said A) because since Heptane boils faster, it will condense faster.
This seems retarded cause it doesn't say the temp. it will get distilled at. And they both seem gases.
I said D) because they are both gases and after a certain temp, they will both condense.
I'm not really sure though.
Another one I have which is kinda more of wording issue.
A 32 gram sample of sulfur has a yellow appearance and melts at 118.9C and boils at 444.6C. If exposed to silver, sulfur has the potential to tarnish the precious metal. A 32 gram sample of sulfur can be combined with 2 grams of hydrogen gas to form 34 grams of the "rotten" eggs smelling compund hydrogen sulfide. Sulfur does not dissolve in water however it does burn with a blue flame.
How many characteristic quantitative physical properties about sulfur are mentioned in the above message?
E) more than 3
I'm stuck between D and E cause...
32 gram of sulfur
but it says 32 grams again... confusing mannn
btw a quick question again....
is insulin a pure substance? :o
I've done enough research and worked like 3 hours and this whole set of questions. (More than these 3 but these 3 have stumped me (kinda)).