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Concept Review Questions 3.1 The atomic mass of Cl is 35.45 amu, and the atomic mass of Al is 26.98 amu. What are the masses in grams of 3 mol of Al atoms and of 2 mol of Cl atoms?

Concept Review Questions 3.1 The atomic mass of Cl is 35.45 amu, and the atomic mass of Al is 26.98 amu. What are the masses in grams of 3 mol of Al atoms and of 2 mol of Cl atoms?

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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Question 1 and 6 please
PROBLEMS Problems with colored numbers are answered in Appendix E and worked in detail in the Student Solutions Manual. Problem sections match those in the text and give the numbers of relevant sample problems. Most offer Concept Review Questions, Skill-Building Exer- cises (grouped in pairs covering the same concept), and Problems in Context. The Comprehensive Problems are based on material from any section or previous chapter. 3.6 You need to calculate the number of P. molecules that can form from 2.5 g of Ca3(PO4)2. Draw a road map for solving this and write a Plan, without doing any calculations. 3.7 Each of the following balances weighs the indicated numbers of atoms of two elements: The Mole (Sample Problems 3.1 to 3.7) Concept Review Questions (3.1 The atomic mass of Cl is 35.45 amu, and the atomic mass of Al is 26.98 amu. What are the masses in grams of 3 mol of Al atoms A and of 2 mol of Cl atoms? 3.2 (a) How many moles of C atoms are in 1 mol of sucrose (C12H„O1)? (b) How many C atoms are in 2 mol of sucrose? 3.3 Why might the expression "1 mol of chlorine" be confusing? What change would remove any uncertainty? For what other ele- ments might a similar confusion exist? Why? For each balance, which element-left, right, or neither, (a) Has the higher molar mass? (b) Has more atoms per gram? (c) Has fewer atoms per gram? (d) Has more atoms per mole? 3.4 How is the molecular mass of a compound the same as the molar mass, and how is it different? 3.5 What advantage is there to using a counting unit (the mole) for amount of substance rather than a mass unit?
Transcribed Image Text:PROBLEMS Problems with colored numbers are answered in Appendix E and worked in detail in the Student Solutions Manual. Problem sections match those in the text and give the numbers of relevant sample problems. Most offer Concept Review Questions, Skill-Building Exer- cises (grouped in pairs covering the same concept), and Problems in Context. The Comprehensive Problems are based on material from any section or previous chapter. 3.6 You need to calculate the number of P. molecules that can form from 2.5 g of Ca3(PO4)2. Draw a road map for solving this and write a Plan, without doing any calculations. 3.7 Each of the following balances weighs the indicated numbers of atoms of two elements: The Mole (Sample Problems 3.1 to 3.7) Concept Review Questions (3.1 The atomic mass of Cl is 35.45 amu, and the atomic mass of Al is 26.98 amu. What are the masses in grams of 3 mol of Al atoms A and of 2 mol of Cl atoms? 3.2 (a) How many moles of C atoms are in 1 mol of sucrose (C12H„O1)? (b) How many C atoms are in 2 mol of sucrose? 3.3 Why might the expression "1 mol of chlorine" be confusing? What change would remove any uncertainty? For what other ele- ments might a similar confusion exist? Why? For each balance, which element-left, right, or neither, (a) Has the higher molar mass? (b) Has more atoms per gram? (c) Has fewer atoms per gram? (d) Has more atoms per mole? 3.4 How is the molecular mass of a compound the same as the molar mass, and how is it different? 3.5 What advantage is there to using a counting unit (the mole) for amount of substance rather than a mass unit?
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