Zeroes to the right of all other digits are only significant if there is a decimal point written.For example, the number 209 has three significant figures. Digits 1 through 9 are significant, and so are zeroes in between them.The number 3.5 for example is assumed to range from 3.4 to 3.6 when an exact precision is not given. When measured numbers are given, the last digit is assumed to be ☑.
Significant figures are used to ensure that precision is communicated correctly. Kelvin, on the AP exam, can be converted to Celsius by adding 273.15. Pure water freezes at 0° Celsius (273K) and boils at 100 ☌ (373K). Fahrenheit is not used on the AP exam.You should remember everything here from your high-school level chemistry class. As is with all AP exams, LEAVE YOUR CELL PHONE AT HOME OR IN CAR. Pencils, pens, erasers, calculator, watch that doesn't beep, snacks, water, and tissues. In general, this is how the base score is converted into the final score:ġ01-150 - 5 81-100 - 4 61-80 - 3 41-60 - 2 0-40 - 1 What Should I Bring? Students are allowed to work again on part A if they finish part B early, but they are not allowed to regain access to calculators. Part B is 40 minutes long, includes 3 questions, and does not allow a calculator. Part A is 55 minutes long and allows a calculator. This section is 95 minutes long, and is worth 75 points. An open ended section with six questions.A 75 question multiple-choice section that is 90 minutes long.The AP Chemistry exam contains two sections. Before the May 2011 AP exams, points were taken off for incorrect multiple choice answers, but this is no longer done. Unlike the SAT, AP exams contain open-ended questions in conjunction with multiple choice questions. It is not necessary to take an AP class to take that exam, and vice versa. The tests are taken in May, and the scores usually arrive by July. It is scored from one to five, with three usually being the minimum to get college credit. The AP exam tests your knowledge of a specific subject at the college level. Wikipedia has related information at Advanced Placement ExamsĪdvanced Placement exams are created and administered by the College Board, The same organization that does SATs. 15.3.1 Naming alkanes, alkenes, and alkynes.12.3.3 Determining the mass of the metal produced.11.2 Finding the Value of the Equilibrium Constant.4.2 Intermolecular Forces That Cause Ideal Gas Theory to Fail.2.1.3 Multiplying and Significant Figures.