Lora Obaid
Science Tutor- chemistry, biochemistry, physics, psychology, and biology for all ages, also can tutor MCAT and SAT math




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Lora Obaid
Bachelors degree
/ 55 min
Your biology tutor - Lora
I am a science tutor who loves science! I recently graduated with my Bachelor of Science in Chemistry and am on the pre-medical track. Throughout college, I led independent supplemental study sessions in Principles of Genetics, making my own practice problems for students to use. I also tutored high school chemistry and middle school science in my free time, and have tutored since I was in high school. I have experience working with a variety of age ranges, from younger kids to college students. I love to spread my enthusiasm for science and personalize my tutoring to the students' needs. I love to lead engaging sessions and enjoy including real-world examples in my teaching. I am also a visual learner, so I draw diagrams to help explain concepts and will create specific practice problems for our session, along with answer keys for you to take away and continue to practice after our session. I request that my students send me their questions and topics of interest ahead of time (preferably 24 hours before), so I am able to sufficiently prepare material so that we can have a successful lesson. Let's work together not only to succeed in your science courses, but to enjoy the journey there!
Meet Lora
Lora graduated from University of Maryland, College Park

Academic expertise of your biology tutor
Homework help
Real world application
Visual learning
Review sessions
Advanced Placement (AP) Program (USA)
AI modules
Summary
Podcast
Quiz
Learnings
Flashcard
Spotlight
Zero Risk Guaranteed
15-days refund
Free tutor swap
No cancel fee
1-yr validity
24/7 support
Types of students for biology class
High School students
Middle School students
ADHD
College students
Home schooled
Anxiety or Stress Disorders
Elementary School students
Your biology tutor also teaches
Biology
Cell biology
Genetics

Biology concepts taught by Lora
The Student and Tutor reviewed key chemistry concepts including intramolecular and intermolecular forces, oxidation numbers, and VSEPR theory with Lewis dot structures. They practiced identifying different types of forces and applying rules for oxidation number assignment and VSEPR geometry determination through example problems. For follow-up, the Student was assigned practice problems on Lewis dot structures and VSEPR geometries, as well as a recommendation to complete additional oxidation number problems and utilize online resources like Chad's Prep for further practice.
Intramolecular & Intermolecular Forces
Oxidation Numbers & Rules
Lewis Dot Structures for VSEPR
VSEPR: Electron Domain & Molecular Geometry
The Student and Tutor reviewed fundamental chemistry concepts for an upcoming exam, focusing on types of chemical bonds (ionic, covalent, metallic), the octet rule, and intermolecular forces (London Dispersion, Dipole-Dipole, Hydrogen Bonding) and their relative strengths. The session also touched upon VSEPR theory and electron configurations. The Student is expected to share their test review guide and course syllabus with the Tutor to prepare for future sessions.
The Octet Rule & Ion Formation
Identifying Metals
Non-metals
and Metalloids
Intermolecular Forces (IMFs)
Polarity and Electronegativity
Chemical Bonding Types
The Student and Tutor reviewed various methods for calculating enthalpy change, including bond enthalpies and standard heats of formation. They practiced drawing Lewis structures for molecules and applied these to solve thermochemistry problems. The Tutor provided guidance on balancing equations and converting between mass, moles, and energy, with a follow-up plan for the Student to provide their syllabus and practice with online resources.
Enthalpy of Reaction: Three Calculation Methods
Calculating with Bond Enthalpies
Lewis Structures: Drawing & Octet Rule
Calculating with Standard Heats of Formation (ΔH°f)
Molar Heat of Formation and Thermochemical Equations
The Student and Tutor reviewed Hess's Law by solving multi-step problems, including balancing equations with fractions. They then focused on calculating the enthalpy of a combustion reaction using standard heats of formation, balancing the chemical equation, and converting heat per mole to heat for a specific mass of reactant. The Tutor provided the Student with a website for practicing basic math skills and significant figures for quiz preparation.
Stoichiometry & Heat Released (Grams to Kilojoules)
Basic Fraction Arithmetic in Chemistry
Balancing Complex Chemical Equations (with Fractions)
Standard States and Enthalpies of Formation
Enthalpy of Reaction (ΔHᵣₓₙ) from Standard Heats of Formation (ΔHf°)
Hess's Law of Summation
Combustion Reactions: Complete vs. Incomplete
Student and Tutor reviewed various chemistry concepts from Unit 2 and Unit 3, focusing on missed questions from recent quizzes. They practiced calculations involving density, percent yield, and ion concentrations, and clarified concepts such as significant figures, electrolytes, solubility rules, limiting reagents, and balancing chemical equations. The Tutor offered to share the session's notes and recommended further practice.
Balancing Chemical Equations & Law of Conservation of Mass
Limiting Reactants and Excess Reagents
Mole Ratios and Ion Concentrations
Solubility Rules and Electrolyte Classification
Percent Yield in Chemical Reactions
Density and Unit Analysis
The Student and Tutor had a chemistry session to review Hess's Law, the law of summation, and bond energy in preparation for an upcoming quiz. They discussed the theoretical underpinnings of Hess's Law, worked through an example, and began solving more complex problems from the Student's review sheet, including a quick review of fraction arithmetic for chemical calculations.
Hess's Law: The Summation Principle
Manipulating Reaction Equations & Enthalpy (ΔH)
Combining Reaction Steps & Fractions
Calculating the Net Enthalpy Change
Teaching tools used by biology tutor
Digital whiteboard
Quizzes
Practice worksheets
Flashcards
Interactive diagrams

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