Enable contrast version

Tutor profile: Ben L.

Inactive
Ben L.
Experienced Science and Math Tutor
Tutor Satisfaction Guarantee

Questions

Subject: Organic Chemistry

TutorMe
Question:

Would you expect phenol or para-nitrophenol to be more acid, and why?

Inactive
Ben L.
Answer:

The acidity in this case has to do with the stability of the conjugate base, which is what remains of the molecule once a proton is taken away. Having a nitro group on the benzene ring is electron withdrawing, and therefore an anion can be stabilized. Since para-nitrophenol will have the more stable conjugate base, it will be more acidic than phenol.

Subject: Chemistry

TutorMe
Question:

What temperature conditions should a reversible exothermic reaction be run under in order to maximize the yield?

Inactive
Ben L.
Answer:

Since the reaction is exothermic, heat is produced, and therefore heat can be thought of as one of the reaction products. Based on Le Chatleier's Principle, decreased the concentration of one of the reaction products should shift the reaction to the right, thus increasing the yield. Therefore, we should decrease the amount of heat by cooling the reaction.

Subject: Physics

TutorMe
Question:

An inflatable raft is floating in a swimming pool, and a crate is thrown off of the raft and into the pool. What happens to the water level in the pool? Does it increase, decrease, or remain the same?

Inactive
Ben L.
Answer:

The answer is, it depends on whether the crate sinks or floats. First, we can assume that it floats. While it is floating in the water, it displaces an amount of water which is equal to its own weight (this is based on Archimedes' principle). While it was in the raft, it made the raft heavier and caused the raft to also displace an additional amount of water equal to its own weight. So, whether the crate is on the raft or floating on its own, the amount of water it is responsible for displacing is the same, so there is no change in the water level. We can also consider the other possibility in which the crate sinks. Since it sinks, it displaces its own volume of water. While it was on the raft, it displaces an amount of water equal to its weight. Since it is more dense than water (it must be, if it sinks), it displaces more water when it is displacing water according to its weight rather than according to its volume. Therefore, it displaced more water while on the raft, and the water level must decrease when it is thrown off the raft.

Contact tutor

Send a message explaining your
needs and Ben will reply soon.
Contact Ben

Request lesson

Ready now? Request a lesson.
Start Lesson

FAQs

What is a lesson?
A lesson is virtual lesson space on our platform where you and a tutor can communicate. You'll have the option to communicate using video/audio as well as text chat. You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.
How do I begin a lesson?
If the tutor is currently online, you can click the "Start Lesson" button above. If they are offline, you can always send them a message to schedule a lesson.
Who are TutorMe tutors?
Many of our tutors are current college students or recent graduates of top-tier universities like MIT, Harvard and USC. TutorMe has thousands of top-quality tutors available to work with you.