MGMT 404 CHAPTER 3 QUIZ Exercise 3.28: Problems by Topic – Chemical Formulas and Molecular View of Elements and Compounds Part A Which of the following elements have molecules as their basic units? Check all that apply. ANSWER: fluorine lead nitrogen bromine Correct Exercise 3.30: Problems by Topic – Chemical Formulas and Molecular View of Elements and Compounds Classify each of the following compounds as ionic or molecular. Part A CF2Cl2 ANSWER: molecular ionic Correct Part B CO ANSWER: ionic molecular Correct Part C ClO2 ANSWER: ionic molecular Correct Part D NI3 ANSWER: molecular ionic Correct Exercise 3.34: Problems by Topic – Formulas and Names for Ionic Compounds Write a formula for the ionic compound that forms between each of the following pairs of elements. Part A caesium and chlorine Express your answer as a chemical formula. ANSWER: Correct Part B aluminum and nitrogen Express your answer as a chemical formula. ANSWER: Correct Part C sodium and oxygen Express your answer as a chemical formula. ANSWER: Correct Part D barium and bromine Express your answer as a chemical formula. ANSWER: Correct Exercise 3.46: Problems by Topic – Formulas and Names for Ionic Compounds Write a formula for each of the following ionic compounds. Part A lead(II) chloride Express your answer as a chemical formula. ANSWER: Correct Part B iron(II) iodate Express your answer as a chemical formula. ANSWER: Correct Part C potassium chromate Express your answer as a chemical formula. ANSWER: Correct Part D potassium fluoride Express your answer as a chemical formula. ANSWER: Correct Part E iron(III) hydroxide Express your answer as a chemical formula. ANSWER: Correct Part F calcium phosphate Express your answer as a chemical formula. ANSWER: Correct Exercise 3.52: Problems by Topic – Formulas and Names for Molecular Compounds and Acids Write a formula for each of the following molecular compounds. Part A dichlorine hexoxide Express your answer as a chemical formula. ANSWER: Correct Part B dichlorine monoxide Express your answer as a chemical formula. ANSWER: Correct Part C dinitrogen trioxide Express your answer as a chemical formula. ANSWER: Correct Part D diboron hexahydride Express your answer as a chemical formula. ANSWER: Correct Part E diboron tetrachloride Express your answer as a chemical formula. ANSWER: Correct Exercise 3.58: Problems by Topic – Formula Mass and the Mole Concept for Compounds Calculate the formula mass for each of the following compounds. Part A MgBr2 Express your answer using two decimal places. ANSWER: Correct Part B H3PO4 Express your answer using two decimal places. ANSWER: All attempts used; correct answer displayed Part C CBr4 Express your answer using two decimal places. ANSWER: Answer Requested Part D FeCl2 Express your answer using two decimal places. ANSWER: Answer Requested Exercise 3.66: Problems by Topic – Composition of Compounds Calculate the mass percent com
position of nitrogen in each of the following nitrogen compounds. Part A N2O5 Express your answer using four significant figures. ANSWER: Answer Requested Part B Si3N4 Express your answer using four significant figures. ANSWER: Correct Part C NO2 Express your answer using four significant figures. ANSWER: Correct Part D HNO3 Express your answer using four significant figures. ANSWER: Correct Exercise 3.72: Problems by Topic – Composition of Compounds The American Dental Association recommends that an adult female should consume 3.0 mg of fluoride (F−) per day to prevent tooth decay. Part A If the fluoride is consumed as sodium fluoride (45.24% F), what amount of sodium fluoride contains the recommended amount of fluoride? Express your answer using two significant figures. ANSWER: Correct Exercise 3.80: Problems by Topic – Chemical Formulas from Experimental Data Samples of several compounds are decomposed and the masses of their constituent elements are shown below. Calculate the empirical formula for each compound. Part A 1.245 g Ni, 5.381 gI Express your answer as a chemical formula. ANSWER: Answer Requested Part B 2.677 gBa, 1.382 g Cl Express your answer as a chemical formula. ANSWER: Correct Part C 14.980 g Cu, 7.557 gS, 15.107 gO Express your answer as a chemical formula. ANSWER: Correct Exercise 3.86: Problems by Topic – Chemical Formulas from Experimental Data The molar mass and empirical formula of several compounds are listed below. Find the molecular formula of each compound. Part A C4H9, 114.27 g/mol Express your answer as a chemical formula. ANSWER: Correct Part B CCl, 189.82 g/mol Express your answer as a chemical formula. ANSWER: Correct Part C C3H2N, 208.25 g/mol Express your answer as a chemical formula. ANSWER: Answer Requested Exercise 3.94: Problems by Topic – Writing and Balancing Chemical Equations When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(III) oxide. Part A Write a balanced chemical equation for this reaction. Express your answer as a chemical equation. Identify all of the phases in your answer. ANSWER: Answer Requested Exercise 3.119: Cumulative Problems Combustion analysis of a 13.42-g sample of estradiol (which contains only carbon, hydrogen, and oxygen) produced 39.01 g CO2 and 10.65 g H2O. The molar mass of estradiol is 272.38 g/mol . Part A Find the molecular formula for estradiol. Express your answer as a chemical formula. ANSWER: Answer Requested Exercise 3.60: Problems by Topic – Formula Mass and the Mole Concept for Compounds Calculate the mass (in g) of each of the following. Part A 5.59×1020 SO3 molecules ANSWER: Answer Requested Part B 2.4×1022 H2O molecules Express your answer using two significant figures. ANSWER: m2 = 0.72 g Answer Requested Part C 4.8×1025 O3 molecules Express your answer using two significant figures. ANSWER: Answer Requested Part D 9.77×1019 CCl2F2 molecules ANSWER: Correct