Questions 1-5 thanks 3.1 Atomic Mass1) Chlorine exists as a mixture of 2 major isotopes, Chlorine-35 and Chlorine-37. Calculate the averageatomic mass for Chlorine. See Problem 3.5IsotopeamuAbundance(%)34.9683517CL3717ClFun Sheet to Accompany Chapter 3→ Explain why the atomic masses on the periodic table are decimals.36.9563.2 Molar Mass of an Element and Avogadro's Number2) Setting up using the conversion factor between the number of atoms in a mole & Avogadro'snumber, convert 6.00 x 10⁹ atoms of Cobalt(Co) to moles of cobalt atom. See Problem 3.1475.533) Setting up using the conversion factors of molar mass and/or Avogadro's number:24.47a) A modern penny weighs 2.5 g, but contains only 0.63 g of copper(Cu). How many copperatoms are present in a modern penny? See Problem 3.20b)b) Determine the number of atoms of sulfur in 5.10 moles of sulfur? See Problem 3.13c)4) Which sample has more atoms: 1.10 g of hydrogen atoms, or 14.7 g of chromium atoms? SeeProblem 3.213.3 Molecular Mass5) Calculate the molecular mass (in amu) and molar mass(in grams) of each of the followingsubstances: See Problem 3.23-24a)CH4K₂SO4Ca3(PO4)2

Answered: 3.1 Atomic Mass 1) Chlorine exists as a…

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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Questions 1-5 thanks

3.1 Atomic Mass
1) Chlorine exists as a mixture of 2 major isotopes, Chlorine-35 and Chlorine-37. Calculate the average
atomic mass for Chlorine. See Problem 3.5
Isotope
amu
Abundance(%)
34.968
35
17
CL
37
17
Cl
Fun Sheet to Accompany Chapter 3
→ Explain why the atomic masses on the periodic table are decimals.
36.956
3.2 Molar Mass of an Element and Avogadro's Number
2) Setting up using the conversion factor between the number of atoms in a mole & Avogadro's
number, convert 6.00 x 10⁹ atoms of Cobalt(Co) to moles of cobalt atom. See Problem 3.14
75.53
3) Setting up using the conversion factors of molar mass and/or Avogadro's number:
24.47
a) A modern penny weighs 2.5 g, but contains only 0.63 g of copper(Cu). How many copper
atoms are present in a modern penny? See Problem 3.20
b)
b) Determine the number of atoms of sulfur in 5.10 moles of sulfur? See Problem 3.13
c)
4) Which sample has more atoms: 1.10 g of hydrogen atoms, or 14.7 g of chromium atoms? See
Problem 3.21
3.3 Molecular Mass
5) Calculate the molecular mass (in amu) and molar mass(in grams) of each of the following
substances: See Problem 3.23-24
a)
CH4
K₂SO4
Ca3(PO4)2

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The average atomic mass of the sum of the atomic mass of each isotope multiplied by its abundance percentage.

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