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3.30 The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm. (a) How many moles of lead(II) sulfide are in 1.00 ft' of galena? (b) How many lead atoms are in 1.00 dm' of galena? 3

3.30 The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm. (a) How many moles of lead(II) sulfide are in 1.00 ft' of galena? (b) How many lead atoms are in 1.00 dm' of galena? 3

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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only question 30 please
ogen izer is determined mainly by its mass % N. Rank the following fertilizers, most ef- fective first: potassium nitrate; ammonium nitrate; ammonium sulfate; urea, CO(NH2)2. 3.30 The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm. (a) How many moles of lead(II) sulfide are in 1.00 ft' of galena? (b) How many lead atoms are in 1.00 dm of galena? 3.31 Hemoglobin, a protein in red blood cells, carries O2 from the lungs to the body's cells. Iron (as ferrous ion, Fe2+) makes up 0.33 mass % of hemoglobin. If the molar mass of hemoglobin is 6.8x10* g/mol, how many Fe+ ions are in one molecule? Determining the Formula of an Unknown Compound (Sample Problems 3.8 to 3.11) Concept Review Questions 3.32 What is the difference between an empirical formula and a molecular formula? Can they ever be the same? 3.33 List three ways compositional data may be given in a prob- lem that involves finding an empirical formula. 3.34 Which of the following sets of information allows you to obtain the molecular formula of a covalent compound? In each case that allows it, explain how you would proceed (draw a road map and write a plan for a solution).
Transcribed Image Text:ogen izer is determined mainly by its mass % N. Rank the following fertilizers, most ef- fective first: potassium nitrate; ammonium nitrate; ammonium sulfate; urea, CO(NH2)2. 3.30 The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm. (a) How many moles of lead(II) sulfide are in 1.00 ft' of galena? (b) How many lead atoms are in 1.00 dm of galena? 3.31 Hemoglobin, a protein in red blood cells, carries O2 from the lungs to the body's cells. Iron (as ferrous ion, Fe2+) makes up 0.33 mass % of hemoglobin. If the molar mass of hemoglobin is 6.8x10* g/mol, how many Fe+ ions are in one molecule? Determining the Formula of an Unknown Compound (Sample Problems 3.8 to 3.11) Concept Review Questions 3.32 What is the difference between an empirical formula and a molecular formula? Can they ever be the same? 3.33 List three ways compositional data may be given in a prob- lem that involves finding an empirical formula. 3.34 Which of the following sets of information allows you to obtain the molecular formula of a covalent compound? In each case that allows it, explain how you would proceed (draw a road map and write a plan for a solution).
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