And molar mass - Study guides, Class notes & Summaries

CHEM 104 Final Exam; Questions and Answers 100% Solved A sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample? [Molar mass: Al, 26.98 g/mol] Correct answer 1.30 g What is the number 3,000 written in scientific notation using the proper number of significant figures? Correct answer 3 × 10^3 Which statement about the modern periodic table is FALSE? Correct answer Elements in the same period share similar chemical and physical propertie

atomic number - Answer The same as the number of protons in the nucleus of an element; it is also the same as the number of electrons surrounding the nucleus of an element when it is neutrally charged. mass number - Answer The sum of an atom's neutrons and protons isotopes - Answer Atoms of an element with different numbers of neutrons Avogadro's number - Answer 6.022×10²³ particles per one mole Moles - Answer grams/molar mass Standard Temperature and Pressure (STP)...

First Semester Study Guide AP Chem Buck Exam 196 Questions with Verified Answers Salts containing which of the following ions are generally insoluble in cold water? a. nitrate b. acetate c. phosphate d. potassium e. ammonium - CORRECT ANSWER C. Phosphate Which of the following changes alone would cause a decrease in the value of Keq for the reaction represented above? a. Decreasing the volume of the reaction vessel b. Adding a catalyst c. Increasing the volume of the reacti...

GACE Science Practice Test Questions and Answers Already Passed A researcher is studying the response of bacteria to a certain chemical. In 3 experiments, the bacteria swim towards the chemical, and in one experiment the bacteria swims away from it. What would be the most appropriate next step for the researcher. a. Report only the 1st three experiments. b. Report all the experiments but refrain from making any conclusions. c. Repeat the experiment several more times and apply a stati...

IB Chemistry SL Latest Update Graded A+ element a substance that cannot be broken down into simpler substances. atom smallest part of an element. compound substance that contains more than one element. empirical formula this shows the simplest whole number ratio of atoms of each element in a particle of the substance. molecular formula shows the actual number of atoms of each element in a molecule of the substance. structural formula this shows the arrangement of atoms an ...

Types of prevention - answer-primary- car restraints, bicycle helmets, immunizations secondary- prevent for those with RF-pap, mammo tertiary-mgmt of established disease- meds, lifestyle Primary - answer-Preventing the health problem, most cost effective form of healthcare **IMMUNIZATIONS, ensuring adequate illumination at home (preventing falls) Secondary - answer-Detecting disease in early asymptomatic stages, screenings -Early cause finding of asymptomatic disease via the use of a sc...

atomic number CORRECT ANSWER The same as the number of protons in the nucleus of an element; it is also the same as the number of electrons surrounding the nucleus of an element when it is neutrally charged. mass number CORRECT ANSWER The sum of an atom's neutrons and protons isotopes CORRECT ANSWER Atoms of an element with different numbers of neutrons Avogadro's number CORRECT ANSWER 6.022×10²³ particles per one mole Moles CORRECT ANSWER grams/molar mass Standard Temperatur...

2023 AQA A-level PHYSICS 7408/2 Paper 2 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] A-level PHYSICS Paper 2 Friday 9 June 2023 Morning Time allowed: 2 hours Materials For this paper you must have: • a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in th...

Chapter 01 - Structure and Bonding 1. Give the ground-state electron configuration for carbon (atomic number 6). 1s22s22px12py1 or 1s22s22p2 2. Give the ground-state electron configuration for fluorine (atomic number 9). ANSWER: POINTS: 1 1s22s22px2 2py2 2pz1 or 1s22s22p5 3. Give the ground-state electron configuration for magnesium (atomic number 12). 1s22s22p63s2 4. How many electrons does silicon have in its valence shell? ANSWER: four POINTS: 1 Exhibit 1-1 Write valid Lewis (elec...

BTEC Applied Science Unit 1 Chemistry (Graded) How many electrons can a d subshell hold? correct answer10 Which subshells are available in the first energy level? correct answers Which subshells are available in the second energy level? correct answers and p Which subshells are available in the third energy level? correct answers, p and d What is Hund's rule? correct answerOrbitals must all be singly filled before they can be doubly occupied Which elements do not fill the 4s subshell befor...