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Free Chemistry Help
I provide Free Chemistry Help upto High School Level. Just place your questions at the Free Chemistry Help Forum and they will be answered in no time.
Chemistry Quizzes
 I provide Practice questions in Chemistry to the students on this website. Detailed quizzes with answers have been compiled for all the courses offered here. For Chemistry Quizzes, please click here.
Useful Resources

Important Chemical Reactions

Displacement Reactions and Net Ionic Reactions
What My Students Have to Say

You have made Chemistry so simple for my daughter. She says you are even better than her professor and that her classmates would like to have you as her professor.

Meera, California(parent)

I have gained immense confidence after studying with the tutors on this website. I recommend the tutors here to everyone who needs online tutoring and homework help.

Sarah Hamilton(Math)

My exams had gone off so well after my sessions for MCAT exams with you. I have thoroughly understood Aromatic Reactions, Alkenes and Alkynes after studying with you. Thank you so much. You are the best Chemistry Tutor I have ever had.

Yashika Patel, Boston(MCAT )

You are the best tutor that I have come across in my life. Keep up the good work.

Nick(MCAT)

Dear Uma, We want to thank you for the all hard work you did teaching Felix chemistry: Thanks to your dedicated tutoring he was able to score 760 on his Chemistry SAT test . We are very happy with the test results.

Alex and Katrina Glozman (parents of SAT/AP/general chemistry)

Hi Uma
I got my sat score today. I received a 760 for chemistry. Thank you very much for all your teachings.Under your guidance I will be successful in chemistry..

Felix(SAT Chemistry)

My wife and I will like to thank you for helping our son do so well at AP Chemistry. Although he got a 4, given where you picked him up and the total lack of teaching in his school, the exam outcome was a realistic one.
Mrs. Sharma. my son holds you in very high regard. He describes you as "One of the best teacher in the World " and he says so with a lot of conviction.
As parents we are grateful to you for helping him change his attitude to Chemistry from total fear and intimidation to love for the subject.

Mr P Maitra(Father of AP chemistry student)

Wanted to let you know that Mallika got a 5 on her AP Chemistry exam. Thank you for your efforts.

Radhika Madhusudan mother of AP student

Hello Uma, I just want to let you know that I got accepted to Midwestern University- Chicago College of Pharmacy (my preference) and I also received an invitation to interview at University of Illinois at Chicago College of Pharmacy as well! Both of these schools are the best in my area. I am beyond excited and overjoyed. Of course, it would not have been possible without your assistance and support in organic chemistry. My professors thought that I should pursue advanced organic chemistry or even PhD's- they did not know I worked with a great tutor by my side and that it had made all the difference for me to have met you. My success in my organic chemistry class spilled over to other science classes that I took. I plan to continue working hard and perhaps, very soon, I will need another session with you! Thank you very much again! Sincerely, Cat

Catphuong Nguyen(pharmacy student)

Dear Dr. Sharma, I want you to know that I see you as a mentor. So far, in my life, it has been my mentors who have really helped me, guided me, and I know will mold me even beyond the scope of my career. I will always remember to thank you for all you do. Thank you for all of your help and guidance, Dr. Sharma. Hope you feel better and I will get Sitopladi and Honey :) Kindest Regards, Vinay Sehgal

Vinay Sehgal (organic chemistry student)

Hello Uma, Thank you for your session this morning. My daughter said it was very informative and she learnt well. She said she liked the fact that you asked her questions. Please make sure she understands her basics well, even if it takes more of your time. I have bought a package for 5 hours. As discussed this morning, please schedule the lesson for 8:00 -10:00 am EST tomorrow 3/5. Thank you again for your time and efforts. Vidya

Vidya (mother of Deepika organic chemistry student)

I got my scores-in general chemistry my correct answers were 26 out of 30 questions so my DAT score is 20 out of 30. in organic chem my correct answers were 23 out of 30 questions so my DAT score is 19 out of 30. my average DAT score is 19 out of 30...not bad. we have to see what is the cut off of new york university. it shoud be around 18 or 19 or 20..according to the office people in the university. will come to know in 2013 spring thanks to you for everything..Icouldn't have scored even this much without your help. The overall exam was not that easy..there were some pretty hard questions.specially the PAT section was quite hard when I travel to india this december I will get all the DAT books for you. barrons,kaplan,dat destroyer. thanks again ,will talk when u are free. I was called for interview. will get the result on 3 weeks

Jaspreet (DAT student)

hello uma ji, The cut off of DAT at the new york university has gone down to 17. i have a score of 19 . still waiting for my result. my application got submitted after the deadline due to some reasons. but hoping for the best. hope you are still rocking at ur lectures and wishing you luck as always

Jaspreet(DAT student)

Hi I am Shah here.I am taking regular tutoring from chemtopper for organic I from uma sharma(tutor).Today I appeared in my final examination and my professor just scanned my answers and told me to get enroll in organic II .This is never heard in USA that a professor asking a student to join a course like this.I think this is something awesome in a student's career .I am really thankful to chemtopper and specially to Uma Sharma (my preferred tutor) who really helped me a lot during my examination time.She helped me understanding organic chemistry in much simpler way by her unique way of teaching.I would like to continue with her as my preferred tutor for organic chemistry II.

Shah (2009)(organic chemistry student)

I had been a novice at Chemistry when I joined Organic Chemistry-I. In my first exam I had got ‘F’ grade and was on the verge of leaving Organic Chemistry when I found you. You have made Organic Chemistry so simple for me. I am now the topper of my class having scored 100% in my exams !!!

Kim Dewitt(organic chemistry student)

In my DAT I was in the top 93 percentile of the US for that section, which means I scored higher than 93% of all test takers. it was all thanks to you Can't tell you how much you helped.

Neha Garge(DAT student)

Hello I would like to thank a very articulate tutor Miss Uma Sharma specifically for helping me with Organic chemistry. Her knowledge of subject is amazing. The way she deals with the topics reveals her deep understanding of the subject. Her encouragement to delve deeper into the subject keeps me flocking into her session. She helps me understand my assignments well so that i am able to work independently. She was never lost for words when questioned, and i always had answers. Miss Uma Sharma is indeed an asset as a tutor. I praise her dedication and genuine love for her profession that was evident in the way she taught.

SHAH Colorado, USA(organic chemistry)

Ms.Uma was very helpful. The active teaching when she asks the student gives the student practice and ensures their understanding which I found helpful.

Neije(Moitreyee)IB student

Uma, Qian transfer from 11th grade to 12th grade on chemistry subject, she was assessed 2 days ago. When I got the news, I want to thank you again for being a very good chem teacher.

Helen( Quian's mother)

I was so happy when I heard my daughter passed AP Bio & Chem both with 4s. Her effort has paid off. I credit Chemtopper for tutoring her. My daughter's school wasn't able to offer AP classes, and I wasn't able to find tutors who taught AP in English in China, so I turned to online AP courses, and I found Chemtopper. Chemtopper's team is wonderful; both our Bio and Chem tutors are PhDs and very experienced tutors. We went through all the content in 3 months and passed the exams with satisfactory results.

Helen Feng(Qian's mother)

just to let you know that Aarti got an offer for a Pharmacy course in London ,King's colleges.She is very excited... she got all the offers from UK thanks for all yr help you gave to aarti she feels comfortable with chemistry

Renuka Patel(mother)

Really good. Tutor was well prepared and explained concepts by using different examples. The sessions are saved so they can be revised afterwards as well. ** HIGHLY RECOMMENDED **

Jamal Ahmed IB chem student

HI Uma ji, I got admission into DDS programme at NYU. Thanks a ton for helping me through and motivating me all the time I wish good luck to you . Your teaching will help make students with a strong foundation God bless you

Jaspreet (DAT student)

Dear Dr. Sharma, Would like to finish chapter 3 in tomorrow's session. I make sure to review notes after our sessions and then go back to re-read the Kaplan book. You are absolutely right: without a complete understanding of the topic, it will be very difficult to grasp the material. Thank you for helping me understand the material so thoroughly.

Vinay Sehgal (MCAT student ))

Dear Uma, My wife and I want to thank you once again for the excellent teaching that you provide to our younger son Thomas. Thanks to your dedicated teaching he, while still in 10th grade, was able to score a 5 in AP Chemistry. You helped him build a solid foundation in inorganic chemistry, and now continue to teach him organic chemistry. He is happy to be your student and we are happy you are his teacher. Sincerely, Ekaterina and Alex Glozman

Alex and Katrina Glozman (parents)

Hi Dr. Sharma, I'm reviewing Orgo Part 2. Everything you taught me is coming back very easily. Once again, thank you! Orgo is 25% of the Biological Sciences section and every point counts. Chemistry is 50% of the Physical Science section so I am making sure to keep up in that area too. Hope you have a safe trip. See you soon. Kind Regards, Vinay Sehgal

Vinay Sehgal (MCAT student ))

A great tutor who enjoys chemistry as well as teaching it. Her teaching style is very understandable and easy. Neither have i had such a good chemistry tutor or have I understood chemistry as much as i did before I started classes with Uma. Couldn't ask for a better chemistry tutor!

Sai Muttavarapu-2013

Great job teaching Organic Chemistry specifically mechanisms of reactions. Thank you.

Felix

After the session I finally understood resonance structures of organic compounds. This is a high yield topic on the MCAT. I wish my college professor could teach as well as Uma.

Felix

I'm in the IB program, and having these online sessions to review for my exams are perfect! Thanks a lot!

Dusan

Really good. Tutor was well prepared and explained concepts by using different examples. The sessions are saved so they can be revised afterwards as well. ** HIGHLY RECOMMENDED **

Jamal Ahmed

It's great that you are so patient in explaining things multiple times and giving extra examples to work out to make sure that I understand the points. Thanks for all your help!

Sunitha

Great session, I really like how you're challenged on your knowledge, it keeps you on your toes while learning - thanks!!

Trevor

very good lecture. mrs. uma know where to hit the chord

Jim

the lecture was awesome. never thought i could solve organic chemistry with ease . it has been made possible under the guidance mrs. uma sharma..a wonderful teacher who has a very fine understanding of the needs of her students .

Jaspreet

I can tell you, the help is so valuable. I was ranging from 74-82%, everything is 90+ now waiting for the chem marks to be posted from last week. amazing tutoring in chemistry

Trevor Poole


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About DAT Chemistry Exam
Date of Exam.

The DAT Tests are administered year-round at Prometric Test Centers in the United States, it's territories including Guam, Puerto Rico, and the U.S. Virgin Islands, and Canada.

The student must apply to take the test with the American Dental Association (ADA) and receive eligibility letter prior to scheduling the testing appointment with Prometric

DAT Scores

DAT scores are based on the number of correct responses; therefore, examinees are not penalized for guessing. The results are reported in terms of standard scores rather than raw scores or percentile equivalents.

Scores used in the testing program range from 1 to 30. There are no passing or failing scores; the standard score of 17 typically signifies average performance on a national basis.

Layout of DAT Exam

The DAT consists of the following four tests:

  1. Survey of the Natural Sciences (100)
    Organic Chemistry (30) - For subjects covered in the syllabus
    General Chemistry (30) - For subjects covered in the syllabus
    Biology (40) - For subjects covered in the syllabus
  2. Perceptual Ability (90)
    The Perceptual Ability Test is comprised of six subtests: 1.) apertures, 2.) view recognition, 3.) angle discrimination, 4.) paper folding, 5.) cube counting, and 6.) 3D form development.
  3.  Reading Comprehension (50)
    This test contains three reading passages on various scientific topics. Prior understanding of the science topics is not a prerequisite to answering the test items. The reading passages require the ability to read, comprehend, and analyze thoroughly basic scientific information.
  4. Quantitative Reasoning (40)
    Mathematical Problems For details, please click here
Study Packages
I offer the following subjects for the DAT exam:
Organic Chemistry
General Chemistry

I also have qualified tutors available for the following subjects with me:
Biology
Math

The study packages for DAT Exam have been designed to cover the complete DAT syllabus for Organic Chemistry and General Chemistry, . The package can be customized as per your requirements. For Biology and Math, sessions can be adjusted in the same package.

Chemistry Study Material. The study material for the DAT Chemistry Exam is used by me for comprehension of the subject in detail. I use my own presentations which have been prepared keeping the requirements of the students in mind.

Chemistry Practice Quizzes. I also provide Chemistry Quizzes for DAT Chemistry Exam which students can attempt in their own time and discuss with me during the sessions. Please feel free to Contact Me for any clarifications. 

Study Topics .The study topics which are covered in the Organic ChemistryGeneral Chemistry, Biology and Math for the DAT exam have been given out be low.

Atomic Structure
Quiz on Atomic Structure
  1. Chemical and Physical means Atomic masses
    • Chemical and Physical
    • Chemical and Physical
  2. Electron energy levels means Atomic masses
    • Chemical and Physical
    • Chemical and Physical
  3. Electron energy levels means Atomic masses
    • Chemical and Physical
    • Chemical and Physical
Organic Chemistry
Bonding
Atomic orbitals
Molecular orbitals
Hybridization
Lewis structures
Bond angles
Bond lengths
Mechanisms
Energetics
Structure and stability of intermediates: SN1, SN2
Elimination
Addition
Free radical and substitution mechanisms
Chemical and physical properties of molecules
Stability
Solubility
Polarity
Inter- and intra-molecular forces: separation techniques
Organic analysis
Introductory infrared and 1H NMR spectroscopy
Simply chemical tests
Stereochemistry
Conformational analysis
Optical activity
Chirality
Chiral centers
Places of symmetry
Enantiomers
Diasteriomers
Meso compounds
Nomenclature
IUPAC rules identification of functional groups in molecules
Reaction of the major functional groups
Prediction of reaction products and important mechanistic generalities
Acid-base chemistry
Resonance effects
Inductive effects
Prediction of products and equilibria
Aromatic
Concept of aromaticity
Electrophilic aromatic substitution
Synthesis
Identification of the product
The reagents used in
A simple sequence of reactions
General Chemistry
Stoichiometry
Percent of composition
Empirical formulas from percent of composition
Balancing equations
Weight
Weight/volume
Density problems
  Gases
Kinetic molecular theory of gases
Graham's, Dalton's, Boyle's
Charles, and ideal gas laws
Liquids and solids; solutions
Colligative properties
Concentration calculations
Acids and bases; chemical equilibrium
 Molecular
Acid/base
Precipitation and Equilibria Calculations
Thermodynamics and thermochemistry
Laws of thermodynamics
Hess Law
Spontaneity prediction
Chemical kinetics
Rate laws
Activation energy
Half life
Oxidation-reduction reactions
Balancing equations
Determination of oxidation numbers
Electro-chemical concepts and Calculations
Periodic properties
Including categories of non-metals
Transition metals
Non-transition metals
Atomic and molecular structure
Electron configuration, orbital types
Lewis-Dot diagrams
Atomic theories
Molecular geometry
Bond types
Quantum mechanics
Nuclear Reactions
Biology
Origin of life
Cell metabolism Including photosynthesis
Enzymology
Thermodynamics
organelle structure and function
Biological organization and relationship of major taxa
Monera
Angiosperms
Arthropods
Chordates
Animal behavior Including social behavior
Using the five-kingdom system; structure and function of vertebrate systems
Integumentary
Skeletal
Muscular
Circulatory
Immunological
Digestive
Respiratory
 Urinary
Nervous
Endocrine and reproductive
Speciation
Fertilization
Descriptive embryology
Developmental mechanics
Mendelian inheritance
Chromosomal genetics
Meiosis
Molecular and human genetics
Natural selection
Population genetics
population and community ecology
Math
Algebraic equations
Fractions
Conversions (ounces, pounds, inches, feet)
Percentages
Exponential notation
Probability and statistics
Geometry
Trigonometry
Applied mathematics problems
   
Study Material for DAT Chemistry
1. Chemical Foundations  
1.1 Scientific Methods Open .pdf presentation
1.2 Units of Measurement Open .pdf presentation
1.3 Uncertainty in Measurement Open .pdf presentation
1.4 Significant Figures and Calculations Open .pdf presentation
1.5 Dimensional Analysis Open .pdf presentation
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