CHMA11H3 Study Guide - Final Guide: Pearson Education, Nitrogen Dioxide, Unified Atomic Mass Unit

Which of the following statements is FALSE according to Dalton's Atomic Theory? A) An atom of nitrogen can be broken down into smaller particles that will still have the unique properties of nitrogen. B) Atoms of sodium do not change into another element during chemical reaction with chlorine. C) Atoms combine in simple whole number ratios form compounds. D) All atoms of chlorine have identical properties that distinguish them from other elements. E) One carbon atom will combine with one oxygen atom to form a molecule of carbon monoxide4. In a chemical reaction, matter is neither created or destroyed. Which law does this refer to? A) Law of Definite Proportions B) Law of the Conservation of Mass C) First Law of Thermodynamics D) Law of Modern Atomic Theory E) Law of Multiple Proportions What is the mass of 0.500 mol of dichlorodifluoromethane, CCl_2 F_2? A) 121 g B) 242 g C) 4.14 times 10^-3 g D) 60.5 g How many millimoles of Ca(NO_3)_2 contain 4.78 times10^22 formula units of Ca(NO_3)_2? The molar mass of Ca(NO_3)_2 is 164.10 g/mol. A) 20.7 mmol Ca(NO_3)_2 B) 79.4 mmol Ca(NO_3)_2 C) 57.0 mmol Ca(NO_3)_2 D) 12.6 mmol Ca(NO_3)_2 E) 13.0 mmol Ca(NO_3)_2 Identify the compound with covalent bonds. A) NaCl B) Kr C) Li D) CH_4 E) KBr If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd) A) 24 gallons B) 47 gallons C) 21 gallons D) 7.1 gallons E) 2.3 gallons Identify a solid. A) no definite shape and definite volume B) no definite shape and no definite volume C) definite volume and definite shape D) definite volume and no definite shape How many Fe atoms are contained in 787 g of Fe? A) 5.90 times 10^25 Fe atoms B) 7.09 times 10^21 Fe atoms C) 4.27 times 10^22 Fe atoms D) 4.18 times 10^24 Fe atoms E) 8.49 times 10^24 Fe atoms Barium belongs to the ______ group of the periodic table. A) alkali metal B) alkaline earth metal C) noble gas D) halogen

statement, "In a chemical reaction, matter is neither created nor destroyed" is called A) the Law of Conservation of Mass B) the Law of Definite Proportions. C) the Scientific Method D) the Law of Multiple Proportions. E) Dalton's Atomic Theory 9) The 10) Without using a calculator, solve the following problem: 10) 1105)(1 102)]2 (1 10-10) A) 1 10-6 B) 1 1034 D) 1 × 1024 11) Round off 00507506 to four significant figures A) 5100 B) 5076 C) 0051 D) 5.075105 12) A substance that can't be chemically broken down into simpler substances is A) a compound B) an element. C) an electron D) a heterogeneous mixture. E) a homogeneous mixture. 12) 13) How many cm are in 20 2 ft? A) 616 cm B) 7.95 cm C) 51.2 cm 13) D) 0.663 cm E) 242 cm 14) What does "X" represent in the following symbol? 28 14 14) A) ruthenium B) zinc C) sulfur D) silicon E) nicke 15) Identify a cation. 15) A) an atom that has gained an electron C) an atom that has lost a proton B) an atom that has gained a neutrorn D) an atom that has lost an electron 16) Which of the following elements is a alkali metal? 16) A) Ca B) U 17) Isotopes differ in the number of 17) A) neutrons. B) electrons C) neutrons and protons D) gamma particles. E) compounds

2.3 MULTIPLE CHOICE 3) The vertical columns or she pere toble re calee 0) perinds 4) Most elements in the periodic table are noble gases 5) Elements in a periodic aroup have simila chemical properties, a) densities D) plhysical propesties 6) Which of the following statements does not describe a chemical property of osygen? n) Oxygen combines with carhon to form carbon dioxide A) Iran wil rst in the presence of orygen D) When coal is burned in oxvien, the process is called en molecules combustion 7) Methane and oxygen react to form carbon dioxide and water. What mass of water is formed 1 3.2 got methane reacts wih 12.M of oxygen to produce 8.8 of carbon dioxide? A) 7.2 B 8) 8.8 u C) 14.8 B D) 16.0 B 8) The current model of the atom in which essentially all of an atom's mass is contained in a very small nucteus, whereas most ot an atom's volume is due to the space in which the atom's electrons move was established by A) Millikan's oil drop experiment C) Thomson's cathode ray tube experiment B) Rutherford's gold foil experiment. D) None of these 9) The mass number of an atom is equal to the number of A) electrons B) neutrons C) protons D) protons plus neutrons 10) Which of the following two atoms are isotopes? 40 24 12 40 12 13 80 41 Ar and Ca B) C and C 18 20 17 35 2.2 SHORT ANSWER QUESTIONS (Fill in the blank, TRUE or FALSE and dimensional analysis calculations) Questions 11 and 12 Complete the sentences in questions 11 and 12 using one of the following definite proportions energy conservation multiple proportions mass conservation 11) The observation that 4.0 g of hydrogen reacts with 32.0 g of oxygen to form a product with O:H mass ratio 8:1, and 6.0 g of hydrogen reacts with 48.0 g of oxygen to form the same product with O/H mass ratio 8:1 is evidence for the law Page 1