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Lewis structures and molecular geometry are important General Chemistry concepts for students preparing for the DAT and OAT. In this video, Dr. Jim Romano reviews Lewis structures, molecular geometry, bonding, electron arrangement, and molecular shape. Understanding how molecular structure...

Lewis structures and molecular geometry are important General Chemistry concepts for students preparing for the DAT and OAT. In this video, Dr. Jim Romano reviews Lewis structures, molecular geometry, bonding, electron arrangement, and molecular shape. Understanding how molecular structure...

Here is a quantitative reasoning practice problem for students preparing for the DAT or OAT. This problem focuses on percentages and translating the information in a word problem into the correct calculation. Problems like this are useful practice for working accurately and efficiently under...

Here is a quantitative reasoning practice problem for students preparing for the DAT or OAT. This problem focuses on percentages and translating the information in a word problem into the correct calculation. Problems like this are useful practice for working accurately and efficiently under...

Test your understanding of ionization energy and periodic trends with today’s DAT and OAT General Chemistry practice question. Consider the process shown in the problem and determine which atom would display the greatest endothermicity. Work through the problem before checking Dr. Romano’s...

Test your understanding of ionization energy and periodic trends with today’s DAT and OAT General Chemistry practice question. Consider the process shown in the problem and determine which atom would display the greatest endothermicity. Work through the problem before checking Dr. Romano’s...

Chemical equilibrium and ICE tables are important topics to understand for both DAT and OAT General Chemistry. In this video, Dr. Jim Romano reviews equilibrium and demonstrates how to approach the dreaded ICE table step by step. Watch the video: DAT & OAT Study Resources: DAT Destroyer and...

Chemical equilibrium and ICE tables are important topics to understand for both DAT and OAT General Chemistry. In this video, Dr. Jim Romano reviews equilibrium and demonstrates how to approach the dreaded ICE table step by step. Watch the video: DAT & OAT Study Resources: DAT Destroyer and...

Here is a quick quantitative reasoning problem for DAT and OAT students practicing exponent patterns and ones digits. Recognizing a repeating ones-digit pattern can often let you solve this type of problem quickly without a calculator. Work through the problem first, then check the second slide...

Here is a quick quantitative reasoning problem for DAT and OAT students practicing exponent patterns and ones digits. Recognizing a repeating ones-digit pattern can often let you solve this type of problem quickly without a calculator. Work through the problem first, then check the second slide...

Here’s a DAT and OAT Quantitative Reasoning practice problem focusing on multiples and divisibility, two basic math skills students should be comfortable applying quickly on test day. Work through the problem first, then check the second slide for the solution. DAT & OAT Study Resources Free...

Here’s a DAT and OAT Quantitative Reasoning practice problem focusing on multiples and divisibility, two basic math skills students should be comfortable applying quickly on test day. Work through the problem first, then check the second slide for the solution. DAT & OAT Study Resources Free...

Molecular formula and empirical formula problems are important practice for DAT and OAT General Chemistry. This problem brings together gas density, molar mass, and molecular formula determination. Work through the problem first, then check Dr. Romano’s handwritten solution on the second slide...

Ideal gas law problems are important practice for DAT and OAT General Chemistry. This problem tests unit conversions, application of the ideal gas law, and converting from moles to the number of molecules. Work through the problem before checking Dr. Romano’s handwritten solution. DAT & OAT...

Ideal gas law problems are important practice for DAT and OAT General Chemistry. This problem tests unit conversions, application of the ideal gas law, and converting from moles to the number of molecules. Work through the problem before checking Dr. Romano’s handwritten solution. DAT & OAT...

Test your General Chemistry skills with today's DAT and OAT practice problem. This problem reviews stoichiometry, mole relationships, and percent efficiency, important concepts for DAT and OAT General Chemistry. Work through the problem carefully, then check Dr. Romano's handwritten solution...

Test your General Chemistry skills with today's DAT and OAT practice problem. This problem reviews stoichiometry, mole relationships, and percent efficiency, important concepts for DAT and OAT General Chemistry. Work through the problem carefully, then check Dr. Romano's handwritten solution...

Review aromatic chemistry for the DAT and OAT with Dr. Jim Romano. This short lesson reviews important Organic Chemistry concepts for DAT and OAT preparation. DAT & OAT Destroyer Study Materials: DAT Destroyer 2026: DAT Destroyer 2026 — Complete DAT Science Prep System | Dr. Jim Romano...

Review aromatic chemistry for the DAT and OAT with Dr. Jim Romano. This short lesson reviews important Organic Chemistry concepts for DAT and OAT preparation. DAT & OAT Destroyer Study Materials: DAT Destroyer 2026: DAT Destroyer 2026 — Complete DAT Science Prep System | Dr. Jim Romano...

Here’s a Biology practice question on ATP and energy for students preparing for the DAT and OAT. Before looking at the second image, see if you can identify why energy input is required to synthesize ATP from ADP and Pi. Then check Dr. Romano’s explanation. Free DAT Preparation Resources...

Here’s a Biology practice question on ATP and energy for students preparing for the DAT and OAT. Before looking at the second image, see if you can identify why energy input is required to synthesize ATP from ADP and Pi. Then check Dr. Romano’s explanation. Free DAT Preparation Resources...

Here’s a General Chemistry practice question for students preparing for the DAT and OAT. Try the problem first, then check the second image for Dr. Romano’s complete solution. Free DAT Preparation Resources from Dr. Jim Romano: Free DAT Preparation Resources DAT Destroyer 2026 – Includes...

Here’s a General Chemistry practice question for students preparing for the DAT and OAT. Try the problem first, then check the second image for Dr. Romano’s complete solution. Free DAT Preparation Resources from Dr. Jim Romano: Free DAT Preparation Resources DAT Destroyer 2026 – Includes...

Here is today’s General Chemistry practice question for students preparing for the DAT and OAT. Try the problem first, then check the second image for Dr. Romano’s solution.

Here is today’s General Chemistry practice question for students preparing for the DAT and OAT. Try the problem first, then check the second image for Dr. Romano’s solution.

Today's DAT and OAT Chemistry practice problem. Try it yourself before checking the answer on the second slide. The amount of ethanol does not matter when calculating the percentage of carbon by mass.

Today's DAT and OAT Chemistry practice problem. Try it yourself before checking the answer on the second slide. The amount of ethanol does not matter when calculating the percentage of carbon by mass.

Can you solve today’s math problem? Try it first, then check the second image for the solution. More free DAT & OAT study resources from Dr. Jim Romano: Free DAT & OAT Study Resources

Can you solve today’s math problem? Try it first, then check the second image for the solution. More free DAT & OAT study resources from Dr. Jim Romano: Free DAT & OAT Study Resources

Can you solve this DAT and OAT math problem? Study the expression carefully and choose your answer before checking the second image for the solution. Find more free DAT and OAT preparation resources from Dr. Jim Romano here: Start Your DAT and OAT Preparation for Free | Official Resources...

Can you solve this DAT and OAT math problem? Study the expression carefully and choose your answer before checking the second image for the solution. Find more free DAT and OAT preparation resources from Dr. Jim Romano here: Start Your DAT and OAT Preparation for Free | Official Resources...

Can you solve today’s coin-value problem from Prof. Denis Barengolts? Use the smallest prime number to determine how many dimes April has, then calculate the total value of all 14 coins. Study the first image, choose your answer, and then view the second image for the complete solution. Free...

Can you solve today’s coin-value problem from Prof. Denis Barengolts? Use the smallest prime number to determine how many dimes April has, then calculate the total value of all 14 coins. Study the first image, choose your answer, and then view the second image for the complete solution. Free...

Buffers are an important General Chemistry topic for both the DAT and OAT. In this video, Dr. Jim Romano reviews the fundamental concepts of buffers, acids, and bases, including the relationship between a weak acid and its conjugate base. Watch the video here: For more free DAT and OAT...

Buffers are an important General Chemistry topic for both the DAT and OAT. In this video, Dr. Jim Romano reviews the fundamental concepts of buffers, acids, and bases, including the relationship between a weak acid and its conjugate base. Watch the video here: For more free DAT and OAT...

Test your Organic Chemistry skills with today’s question from Dr. Jim Romano. Study the first image, choose your answer, and then view the second image for Dr. Romano’s complete solution. Free official DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for...

Test your Organic Chemistry skills with today’s question from Dr. Jim Romano. Study the first image, choose your answer, and then view the second image for Dr. Romano’s complete solution. Free official DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for...

Dr. Jim Romano explains important genetics concepts for the DAT and OAT Biology sections, including inheritance patterns and probability. Watch the video and follow along as Dr. Romano works through the genetics step by step: Free DAT and OAT preparation resources from Dr. Jim Romano: Start...

Dr. Jim Romano explains important genetics concepts for the DAT and OAT Biology sections, including inheritance patterns and probability. Watch the video and follow along as Dr. Romano works through the genetics step by step: Free DAT and OAT preparation resources from Dr. Jim Romano: Start...

Which molecules can easily pass through the cell membrane without a transporter? Consider polarity, molecular size, and lipid solubility before choosing your answer. Dr. Romano’s complete explanation is included on the second slide. Free DAT and OAT study resources: Start Your DAT and OAT...