We know the test: The Kaplan MCAT team has spent years studying every MCAT-related document available.Star Ratings throughout the book indicate how important each topic will be to your score on the real exam-informed by Kaplan's decades of MCAT experience and facts straight from the testmaker.

Online resources, including a full-length practice test, help you master the computer-based format you'll see on Test Day.All material is vetted by editors with advanced science degrees and by a medical doctor.Comprehensive subject review is written by top-rated, award-winning Kaplan instructors.More than 500 questions in the book and online and access to even more online-more practice than any other advanced MCAT book on the market. This edition features commentary and instruction from Kaplan's MCAT experts and has been updated to match the AAMC's guidelines precisely-no more worrying if your MCAT review is comprehensive! Kaplan can be your partner along the way-offering guidance on where to focus your efforts, how to organize your review, and targeted focus on the most-tested concepts. Prepping for the MCAT is a true challenge. Therefore, the coefficient of sulfur dioxide is 9 and the answer is D.Kaplan's MCAT 528 Advanced Prep 2023–2024 features thorough subject review, more questions than any competitor, and the highest-yield questions available-all authored by the experts behind the MCAT prep course that has helped more people get into medical school than all other major courses combined. Check to see that this works for the number of oxygen atoms, and you'll find that the balanced equation is:ĦCuFeS 2(s) + 13O 2(g) → 3Cu 2S(s) + 2 Fe 3 O 4 + 9 SO 2(g)

Therefore, nine must remain for the sulfur dioxide. There are 12 sulfur atoms from the copper iron sulfide, and three are used to make copper sulfide. The next step is to balance the number of sulfur atoms on each side of the equation. The least common multiple of 2 and 3 is 6, so replace the 2 in front of the copper iron sulfide with a 6, replace the 1 in front of copper sulfide with a 3, and place a 2 in front of the iron oxide. We have three irons on the right and two irons on the left. We are going to have to adjust the coefficients we just found, since the copper-containing species on the left also contains iron. So, we place a 2 in front of the copper-containing compound on the left. We have two coppers on the right and one copper on the left. Copper (Cu) appears the least, so balance that first. Kaplan explains why: When balancing equations, you should start with the element that appears in the least number of species. Question: For the following skeletal reaction, what is the coefficient for sulfur dioxide?ĬuFeS 2(s) + O 2(g) → Cu 2S(s) + Fe 3O 4(s) + SO 2(g) Section: Chemical and physical foundations of biological systems Section: Chemical and physical foundations of biological systems

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