Enable contrast version

Tutor profile: Steffy R.

Inactive
Steffy R.
Tutor for 5 years, Masters of Engineering in Biomedical Engineering
Tutor Satisfaction Guarantee

Questions

Subject: Pre-Calculus

TutorMe
Question:

Find the vertex of the parabola y=2x^2-8x+7.

Inactive
Steffy R.
Answer:

We have that x= -{b}/{2a}= -(-8)/(2*2)=2, and then y = 2(2^2)-8(2)+7 y = 8-16+7 y = -1

Subject: Chemistry

TutorMe
Question:

What is the bond dissociation enthalpy of an oxygen-to-oxygen double bond if the enthalpy of combustion for one mole of ethane gas (C2H6) is approximately –1.911 x 103 kJ?

Inactive
Steffy R.
Answer:

C2H6 + (7/2)O2 -> 2CO2 + 3H2O deltaH= Sum of dissociation energies of bone broken - Sum of dissociation energies of bonds created deltaH (Combustion) = (C-C) + 6*(C-H)+ (7/2)*(O=O) - 4*(C=O) + 6*(O-H) -1911 = 348+ 6*413 + (7/2)*(O=O) - 4*799 -6*463 -1911 -348-2478+3196+2778= (7/2)*(O=O) (1237*2)/7 = (O=O) (O=O) = 353.4 KJ/moles

Subject: Algebra

TutorMe
Question:

5(- 3x - 2) - (x - 3) = -4(4x + 5) + 13

Inactive
Steffy R.
Answer:

5 (- 3 x - 2) - (x - 3) = - 4 (4 x + 5) + 13 -15 x - 10 - x + 3 = - 16 x - 20 + 13 - 16 x - 7 = - 16 x - 7 0 = 0

Contact tutor

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

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.
BEST IN CLASS SINCE 2015
TutorMe homepage
Made in California by Zovio
© 2013 - 2021 TutorMe, LLC
High Contrast Mode
On
Off