14 the mass spectrometer - Study guides, Class notes & Summaries

Chapter 03 - Stoichiometry 1. Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes. An atom of bromine-79 contains a. 79 protons, 79 electrons, and 35 neutrons. b. 35 protons, 44 neutrons, and 35 electrons. c. 44 protons, 44 electrons, and 35 neutrons. d. 34 protons and 35 electrons only. e. 35 protons, 79 neutrons, and 35 electrons. ANSWER: POINTS: DIFFICULTY: TOPICS: KEYWORDS: b 1 easy 3.1 atomic theory of matter | early atomic theory | general chemistry | isoto...

Chapter 03 - Stoichiometry 1. Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes. An atom of bromine-79 contains a. 79 protons, 79 electrons, and 35 neutrons. b. 35 protons, 44 neutrons, and 35 electrons. c. 44 protons, 44 electrons, and 35 neutrons. d. 34 protons and 35 electrons only. e. 35 protons, 79 neutrons, and 35 electrons. ANSWER: POINTS: DIFFICULTY: TOPICS: KEYWORDS: b 1 easy 3.1 atomic theory of matter | early atomic theory | general chemistry | is...

Chapter 02 - Atoms, Molecules, and Ions 1. Which of the following statements concerning atomic structure is/are correct? 1. Neutrons and electrons are found in space as a cloud around the nucleus. 2. The nucleus contains all the positive charge of an atom. 3. Electrons surround the nucleus and account for the majority of an atom's volume. a. 1only ANSWER: POINTS: HAS VARIABLES: TOPICS: QUESTION ID: b. 2only c. 3only d. 2and3 d 1 False 2.1 Atomic Structure--Protons, Electrons, and Neu...

AQA A-Level Chemistry (new spec) 1.1 Atomic Structure (2022/2023) Already Passed What are nucleons? Nucleons are protons and neutrons in the nucleus. What is the position of protons? Nucleus What is the relative mass of a proton 1 What is the relative charge of a proton? +1 What is the position of neutrons? Nucleus What is the relative mass of a neutron? 1 What is the relative charge of a neutron? 0 What is the position of electrons? Orbitals What is the relative mass of an electron? 1/1...

Chapter 1—Basic Concepts of Chemistry MULTIPLE CHOICE 1. A hypothesis is a a. mathematical formula that models a pattern of behavior. b. concise statement of a behavior that is always the same under the same conditions. c. set of experiments designed to test a theory. d. well-tested, unifying principle that explains a body of facts. e. tentative explanation or prediction based upon experimental observations. ANS: E 2. A theory is a a. concise statement of a behavior that is always t...

Chapter 1—Matter, Measurements, and Calculations MULTIPLE CHOICE 1. 2. 3. 4. 5. 6. 7. 8. The mass of an object is a. the force between the object and the earth. b. a measure of the amount of matter in the object. c. the amount of space the object occupies. d. depends on the location of the object on the earth. ANS: B PTS: 1 Any two objects are attracted to each other by _____ . a. gravity c. magnetism b. electrostatic forces d. all of them ANS: A PTS: 1 How is the weight of ...

MCAT entrance exam all subjects combined questions & answers latest update 1. Which of the following is the mRNA start codon in most cases? A. UAA B. AGU C. AUG D. UGA 2. Which of the types of RNA is the smallest? A. mRNA B. tRNA C. rRNA D. 3. Which of the following is not considered a pyrimidine? A. C B. T C. U D. G 4. Which of the following is paired correctly? A. A-G B. C-G C. A-U D. G-T 5. Which of the following characterizes a Western blot? A....

AQA A-Level Chemistry Paper 1 – Inorganic and Physical Chemistry Predicted Paper 2023 with marking scheme attached. Name …………………………………………………………………… Date ………………… 2 hours allowed You should have access to the AQA insert (periodic table and data sheet) to help with answering the questions. Grade boundaries These are VERY rough guesses! Getting a C on this paper does not guarantee you the same mark in the exam. ...

Celcius (F-32)5/9 HPC media water bath 45`C, 3hr Precision a measure of how close a series of measurements are to one another Accuracy how close a measurement is to the true value Electrical Fire unplug & sodium bicarbonate analytical balance a device for determining mass that gives highly accurate measurements top loading balance used to determine mass; not as precise as an analytical balance triple beam balance instrument used to measu...

Hazardous Materials (HazMat) Technician .1. Top Revision Guide. 100% coverage. b) Flammability - CGI, Multi-Gas Monitor, PID, FID - -- Used to determine the presence of flammable vapors of hydrocarbon products - They measure the flammable vapors as a percentage of the lower explosive limit - Many combustible gas indicators are combination instruments, that also measure oxygen content and several toxic substances (c) Oxidation potential - Oxygen Meters and Photoionization Detect...