   # Copper atoms. (a) What is the average mass of one copper atom? (b) Students in a college computer science class once sued the college because they were asked to calculate the cost of one atom and could not do it. But you are in a chemistry course, and you can do this. (See E. Felsenthal, Wall Street Journal, May 9, 1995.) If the cost of 2.0-mm diameter copper wire (99.9995% pure] is currently $41.70 for 7.0 g, what is the cost of one copper atom? BuyFindarrow_forward ### Chemistry & Chemical Reactivity 9th Edition John C. Kotz + 3 others Publisher: Cengage Learning ISBN: 9781133949640 #### Solutions Chapter Section BuyFindarrow_forward ### Chemistry & Chemical Reactivity 9th Edition John C. Kotz + 3 others Publisher: Cengage Learning ISBN: 9781133949640 Chapter 2, Problem 101GQ Textbook Problem 3 views ## Copper atoms.(a) What is the average mass of one copper atom?(b) Students in a college computer science class once sued the college because they were asked to calculate the cost of one atom and could not do it. But you are in a chemistry course, and you can do this. (See E. Felsenthal, Wall Street Journal, May 9, 1995.) If the cost of 2.0-mm diameter copper wire (99.9995% pure] is currently$41.70 for 7.0 g, what is the cost of one copper atom?

(a)

Interpretation Introduction

Interpretation:

The average mass of one copper atom are needed to be determined, if the cost of two mm diameter copper wire is $41.70 for 7g The cost of one copper atom are needed to be determined, if the cost of two mm diameter copper wire is$41.70 for 7g

Concept introduction:

• The atomic mass of a copper atom in atomic unit is 63.5456u.
• Conversion formula of atomic unit to gram: one atomic mass unit (u) is one-twelfth of the mass of a carbon atom, that is,

1u=1.66054×1024g

### Explanation of Solution

The atomic mass of a copper atom in atomic unit is 63.5456u.

one atomic mass unit (u) is one-twelfth of the mass of a carbon atom, that is,

1u=1.66054×1024g

Therefore,

The average mass of one copper atom is,

63.5456u×1.66054×1024g1u=1

(b)

Interpretation Introduction

Interpretation:

The cost of one copper atom are needed to be determined, if the cost of two mm diameter copper wire is \$41.70 for 7g

Concept introduction:

• The atomic mass of a copper atom in atomic unit is 63.5456u.
• Conversion formula of atomic unit to gram: one atomic mass unit (u) is one-twelfth of the mass of a carbon atom, that is,

1u=1.66054×1024g

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