AP CHEMISTRY MULTIPLE-CHOICE QUESTION HELP PLEASE!?! Answer given would like to know why it's the correct one?
When dilute nitric acid was added to a solution of one of the following chemicals a gas was evolved. This gas turned a drop of limte water, Ca(OH)2, cludly, due to the formation of a whtie precipitate. The chemical was A) household ammonia, NH3 B) baking soda, NaHCO3 C) table salt, NaCl D) epsom salts, MgSO4 7H2O E) bleach, 5% NaOCl The correct answer is (B). I selected this answer and got it right only because I sort of guessed. I reasoned that baking soda was white and so ya... if someone can please explain from a chemistry point of view why the answer is indeed (B) I would really appreciate it because I don't really understand why and would like to know why
How can I be better at solving multiple choice questions in statistics exam based on post graduate syllabus?
Trust me, don’t go by “a” book. Know the formulae with the derivations. You should be able to derive each and every part of the formulae. That helps. It happens many a times that we want a higher version of the formulae but we only know the generic formulae. You should have the cool and confidence to derive the version then and there.And, of course, practise is the golden key!
How do I master multiple choice for AP Statistics?
When I took the AP Calculus BC multiple choice section, one important strategy is knowing why they picked those wrong choices up there.For instance,What is the mean of 5, 5, 5, 6, 6, 8?A) 5.5 B) 5C) 5.833 D) 28.335.5 is wrong - it's the median. 5 is the mode. 28.33 happens when you don't control your grouping symbols in the calculator. This helps you see the concepts better. For instance, you can spot that one multiple choice answer is correct for the DOMAIN, but the other multiple choice answer is correct for the RANGE. Another one is almost right, but they messed up on reading the minimum value, mixing up a number on the x-axis and y-axis. Probably you are picking the second-best answers, the almost right answers. By defining each answer choice, you'll see the better "right" answer and why you should start picking that one, and you'll begin to spot the "most common wrong answers" and avoid them. On the SAT math, I'd smile when I could spot why the other answer choice was so close to being right, and I could avoid it for being wrong.
AP Statistics Multiple Choice Questions?
My teacher gave the class 30 multiple choice questions for a review for a test on Monday, but she didn't give us any answers, and she won't be in school on Monday to answer any questions. Help me out with these few questions, please!! 1. A traffic consultant wants to estimate the proportion of cars on a certain street that have more than two occupants. She stands at the side of the road for two hours on a weekday afternoon and flips a coin each time a car approaches. If the coin comes up heads, she counts the number of occupants in the car. After two hours, she has counted 103 cars, 15 of which had more than two occupants. Which condition for constructing a confidence interval for a proportion has she failed to satisfy? a) n > or = 30 b) np > or = 10 c) n(1-p) > or = 10 d) The sample is less than 10% of the population. e) The data is an SRS from the population of interest. 2. Suppose a poll was conducted by email, and those conducting the survey are concerned about the possibility of undercoverage, since some people do not use email or have filters that block mass emails. Which of the following is the best way for them to correct for this source of bias? a) Throw this sample out and start over again with a better sampling method. b) Use a higher confidence interval, such as 99%. c) Use a lower confidence interval, such as 80%. d) Use a t-interval instead of a z-interval. e) Take a larger sample. 3. Which of the following has the highest probability? a) Randomly selecting a value between -2 and 2 from a standard Normal distribution. b) Randomly selecting a value between -2 and 2 from a t-distribution with 4 degrees of freedom. c) Randomly selecting a value between -2 and 2 from a t-distribution with 20 degrees of freedom. d) Randomly selecting a value less than -2 or greater than 2 from a standard Normal distribution. e) Randomly selecting a value less than -2 or greater than 2 from a t-distribution with 20 degrees of freedom. Thank you so much!!!!
AP Statistics Standard Deviation Question?
First, you must find the standard deviation for each of the sample proportions. Use the equation: std = Sqrt [np(1-p)], where p is the portion probability and n is the size. Doing this for Dynamite Mints gives you a st.devation of 1.5 (sqrt[25*0.1(1-0.1)]), and a st.devation of 2.487468593 (sqrt[25*0.45(1-0.45)]) for Holiday Mints. When combining st.deviations, you must use the following equation (s will stand for st. deviation): s^2(x + y) = s^2(x) + s^2(y) This means we need to add the variances of each. The variance is the square of the st.deviation. 1.5^2 = 2.25 2.487468593^2 = 6.1875 6.1875 + 2.25 = 8.4375 <-- new variance of the combined data Simply find the sqrt of this variance, and you'll have the standard deviation of the combined data, which is approximately 2.905.
Ap Us Exam? Multiple Choice?
Take a deep breathe, you're fine. As far as I can remember, one AP number goes on your answer sheet and one on your essay pink booklet. I'm thinking really hard to remember, and what I do remember is that you do not put a AP number label on your multiple choice booklet because it is not graded. As far as the student pack goes, it does not matter if you put a number label on that. The student pack is for you and you only. It helps you fill out your Scantron sheet because it has the school number, your AP number, and your information readily available. If you have to take more APs, then all you have to do is put the AP label during the next AP test that you take. My AP teacher even said that they throw out the student packs afterward. They do NOT go to the College Board.
So I have a question in AP Chemistry that I don't know how to answer. Help please!!!?
Question: A student was given a 5.00g sample of a mixture containing 3 substances, A, B, C. Using the physical and chemical properties of each component, the student recovered 2.51g of substance A, 1.36g of substance B, and 0.98g of substance C. Calculate the percent composition of A, B, C. Calculate the percent recovery. I've been looking up how to find the percent composition online but it says that I need to know what the formula of the substance is.
As a highschooler, is AP Statistics or AP Chemistry more beneficial to a college application?
In terms of getting in? Neither really matters. Taking courses and doing well in general matters, but specific courses rarely do. Not even if they’re honors/AP/whatever. No one cares what you took, just that you did well. As long as you’re an A/B student and do well on the standardized tests, you will get into multiple schools. What sets people apart is their extracurriculars and who they are, not what they took.The only thing APs really help with is potentially giving you college credit if you end up going to a school that treats AP scores as giving you credit equivalency. For example, the college I went to for my undergraduate (SUNY Buffalo) would give you credit for all AP scores of 4 and 5 (the number of credits varied between 3 and 8, depending on what the AP exam was - Chemistry gave credit for Chem I and II for a total of 8 credits, but Latin only gave me credit for 3 credits of upper level Latin and an exemption from having to take all but one of the four required college-level language credits); you could take the credit as either just “credit” (i.e., does not apply to your GPA, and you often had to take one extra course to “prove” you still knew the stuff) or for letter credit, with a 5 being an A in the courses you were credited and a 4 being a B. As a result, because I transferred in like 11 AP courses and ended with 46 credits for them, meaning I started school as a second semester sophomore. (Thus, I could have chosen to graduate from college in only 5 semesters, but instead I chose to do four full years and take a bunch of cool stuff, double major, do study abroad, etc., since I was on a full scholarship).
What are ap statistics, ap us history and ap english language like?
I haven't taken AP Statistics yet, so I won't speak for that one. AP US History is much different from the English Lang exam because you are expected to know (mostly) information for History, but not many skills. AP English is ALL skills, no specific information or books that you must be familiar with. However, for AP US you do need essay writing skills and analytical skills for the free response, but it is a much easier exam to study for (or cram) because you can buy flashcards and memorize tons of terms and information for the test. When it gets close to may, if you don't have the skills for the Eng exam, you just don't have them yet. To study for Eng, lots of timed writings and practice multiple choice exams will prepare you.
(ap us history exam)i did not place barcode label on multiple choice section booklet?
Take a deep breathe, you're fine. As far as I can remember, one AP number goes on your answer sheet and one on your essay pink booklet. I'm thinking really hard to remember, and what I do remember is that you do not put a AP number label on your multiple choice booklet because it is not graded. As far as the student pack goes, it does not matter if you put a number label on that. The student pack is for you and you only. It helps you fill out your Scantron sheet because it has the school number, your AP number, and your information readily available. If you have to take more APs, then all you have to do is put the AP label during the next AP test that you take. My AP teacher even said that they throw out the student packs afterward. They do NOT go to the College Board.