Chem 1311 - Study guides, Class notes & Summaries

Atoms correct answer: the basic building blocks of all matter. The smallest unit of an element that can combine with other elements. Subatomic Particles correct answer: The smaller particles that make up atoms - protons, neutrons and electrons. cathode rays correct answer: streams of electrons that are produced when a high voltage is applied to electrodes in an evacuated tube Radioactivity correct answer: The spontaneous emission of radiation by an unstable atomic nucleus Nuclear...

Chem 1311 exam 1 Questions And Answers

CHEM 1311 - Exam 1 Questions With Complete Solutions

CHEM 1311 Exam Questions and Answers All Correct A tentative explanation for a set of observations that can be tested by further experimentation is referred to as - Answer-a hypothesis Identify which of the following are examples of physical properties - Answer--The boiling point of ethanol -The Density of Neon gas -The melting point of gold -The condensation of Steam Give the number of significant figures in each of the following numbers. a. 0. b. 1000. - Answer-6 and 4 The high...

CHEM 1311 Exam 2 Questions and Answers All Correct NH3 (aq) + HNO3 (aq) = NH4NO3 (aq) is classified as what kind of reaction? - Answer-B) acid-base (produces salt and water) Which solution will be the poorest conductor of electrical current? - Answer-A) Sucrose C12H22O22 1.0 M aqueous solution of the following substances are prepared. Which one would you expect to have the lowest electrical conductivity? - Answer-B) CH3CH2OH (ethanol) which of the following is not a redox reaction? - ...

Solutions can exist in all 3 physical states correct answer: Solid: metal alloys (2 or more metals) Gas: Ex: Air — made of nitrogent oxygen and other gases Liquid: this is what we will be primarily discussing in this chapter, mostly solutions where water is the solvent AKA aqueous solutions Nonpolar solvents dissolve_______ correct answer: Nonpolar solutes Polar solvents dissolve______ correct answer: Polar solutes and many iconic solutes Polar correct answer: unequal sharing of...

Which of the following has 8 valence electrons correct answer: b. Kr Which of the following does not have 8 valence electrons correct answer: a. Ca+ & Sr+ Lattic energy is correct answer: a. the energy required to convert a mole of ionic solid into its constituent ions in the gas phase In the ionic bond formation, the lattic energy of ions, _______ as the magnitude of the ion charges _______, and radii __________ correct answer: d. increases, increase, decrease The type of compou...

CHEM 1311 Exam Questions with All Correct Answers How many significant figures should be retained in the result of the following calculation 12.00000 x 0.9893 + 13.00335 + 0.0107 - Answer-3 of the following, only ________ is an extensive property. - Answer-Volume Iron has a density of 7.9 g/cm3. What is the mass of a cube of iron with the length of one side equal to 55.0 mm? - Answer-1.3 x 10^3 In the following list, only ______ is not an example of a chemical reaction. - Answer-cho...

The Greeks correct answerstried to explain chemical changes, proposed four fundamental substances (earth, fire, water, air), first proposed atoms as fundamental particles The Alchemists correct answers"pseudoscience"/tried to change a base metal of lead into gold Robert Boyle correct answersFirst "chemist"/quantitative measurements on gases/proposed the concept of elements Joseph Priestly correct answersdiscovered oxygen/carefully studied chemical reactions Law of Mass Conservati...

CHEM 1311 Test 2 Questions with Correct Answers Propane (C3H8) reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. What is the % yield in this reaction? - Answer-57.6 Gaseous argon has a density of 1.40g/L at standard conditions. How many argon atoms are in 1.00L of argon gas at standard conditions? - Answer-2.11 x 10^22 How many Carbon Atom...