CH4-6 Study guides, Class notes & Summaries

Chapter 03 Stoichiometry: Ratios of Combination 1. Calculate the molecular mass of tetraphosphorus decaoxide, P4O10, a corrosive substance which can be used as a drying agent. A. 469.73 amu B. 283.88 amu C. 190.97 amu D. 139.88 amu E. 94.97 amu 2. Calculate the formula mass of rubidium carbonate, Rb2CO3. A. 340.43 amu B. 255.00 amu C. 230.95 amu D. 145.47 amu E. 113.48 amu 3. Calculate the formula mass of (NH4)3AsO4. A. 417.80 amu B. 193.05 amu C. 165.02 amu D. 156.96 amu E. 108.96 a...

Package Title: Hein Test Bank Course Title: Hein 14e Chapter Number: 3 Question type: Multiple Choice 1) All matter is composed of elements. Approximately how many elements are there? a) 4 b) 10 c) 68 d) 100 Answer: D Difficulty: easy Learning Objective 1: Define an element and write the chemical symbol for an element when given its name. Section Reference 1: Section 3.1 2) The smallest particle of an element that can exist is called a(n) ___. a) atom b) ferrul...

Acids & Bases: 1. All are examples of Lewis acid-base reactions except (A) Cu2+(aq) + 4NH3(aq) →← [Cu(NH3)4]2+(aq) (B) HCl(g) + NH3(g) → NH4Cl(s) (C) H+(aq) + OH-(aq) →← H2O(l) (D) 2Na(s) + Cl2(g) → 2NaCl(s) - correct answer (D) 2Na(s) + Cl2(g) → 2NaCl(s) 2. According to the Lewis definition, an acid is a species (A) having a hydrogen ion. (B) donating a pair of electrons. (C) accepting a pair of electrons. (D) accepting a hydrogen ion. - correct answer (C) accepting ...

The CETP training program was developed by.... A. Occupational Safety and Health Administration ( OSHA ) and the Department of Labor ( DOL ) B. The American Society of Mechanical Engineers ( ASME ) and the National Fire Protection Agency ( NFPA ) C. The National Fire Protection Agency ( NFPA ) and the National Propane Gas Association ( NPGA ) D. The National Propane Gas Association ( NPGA ) and the Propane Education and Research Council ( PERC ) D. The National Propane Gas Associati...

CHEM 104 MODULE 1- MODULE 6 EXAM 2022/2023 100%CORRECT QUESTIONS AND ANSWERS - PORTAGE LEARNING. Portage Learning CHEM 104 Module 1 Exam: Question 1 In the reaction of gaseous N2O5 to yield NO2 gas and O2 gas as shown below, the following data table is obtained: → 4 NO2 (g) + O2 (g) 1. Using the [O2 ] data from the table, show the calculation of the instantaneous rate early in the reaction (0 secs to 300 sec). 2. Using the [O2 ] data from the table, show the calculation of the instan...

Chapter 3 Fossil Fuel Resources and Use 3.1 A person's primary energy needs are supplied exclusively by burning oil (with an energy content of 3.85 × 107 J/L). If a person's average power consumption is 12 kW, how long would it take that person to use one barrel of oil (158.97 liters)? Solution The power 12 kW is the same as energy consumed at a rate of 12,000 J/s. Thus the amount of oil required per second is (12,000 J/s)/(3.85 × 107 J/L) = 3.12 × 10–4 L/s. Thus to consume...

Acids & Bases: 1. All are examples of Lewis acid-base reactions except (A) Cu2+(aq) + 4NH3(aq) →← [Cu(NH3)4]2+(aq) (B) HCl(g) + NH3(g) → NH4Cl(s) (C) H+(aq) + OH-(aq) →← H2O(l) (D) 2Na(s) + Cl2(g) → 2NaCl(s) - correct answer (D) 2Na(s) + Cl2(g) → 2NaCl(s) 2. According to the Lewis definition, an acid is a species (A) having a hydrogen ion. (B) donating a pair of electrons. (C) accepting a pair of electrons. (D) accepting a hydrogen ion. - correct answer (C) accepting ...

CHEM 104 MODULE 1- MODULE 6 EXAM 2022/2023 100%CORRECT QUESTIONS AND ANSWERS - PORTAGE LEARNING. Portage Learning CHEM 104 Module 1 Exam: Question 1 In the reaction of gaseous N2O5 to yield NO2 gas and O2 gas as shown below, the following data table is obtained: → 4 NO2 (g) + O2 (g) 1. Using the [O2 ] data from the table, show the calculation of the instantaneous rate early in the reaction (0 secs to 300 sec). 2. Using the [O2 ] data from the table, show the calculation of the instan...

Science Bowl Chemistry Questions and Answers 100% Pass The ideal fuel for fuel cell use is: A. compressed natural gas B. reformulated gasoline C. hydrogen D. methanol Answer: HYDROGEN Out of the following choices, which is the correct name for N2O3: A. dinitrogen oxide B. dinitrogen dioxide C. dinitrogen trioxide D. dinitrogen tetroxide Answer: DINITROGEN TRIOXIDE Which of the following is an example of a buffer system: A. H2CO3 and water B. H2CO3 and NaHCO3 C. NH3 and N2 D. NaCl...

What is the difference between cations and anions? - Cation is the loss of electrons, the atom becomes more positive. Anion is the gain of electrons, the atom becomes more negative. Differentiate between mass number and atomic number. - Mass number- number of protons and neutrons. Atomic number- number of protons What are valence electrons and what is their significance? - Valence electrons are electrons in the outermost shell of an atom. They are important in determining the bonds that the...