Chapter U4.75, Problem 8E

Interpretation Introduction

Interpretation:

The mass in grams of one copper atom needs to be calculated

Concept Introduction:

Mass is a fundamental property of an object which is representative of the amount of matter present in that object

The average mass of an atom is expressed in terms of atomic mass units (amu)

  $\text{1 amu = 1}{\text{.66×10}}^{\text{24}}\text{ g -----(1)}$

Answer to Problem 8E

Mass of one copper atom is $1.05\times {10}^{-22}\text{g}$ .

Explanation of Solution

As per the periodic table the atomic mass of an atom of copper is 63.5 amu

Based on the conversion expressed in equation (1):

  $\begin{array}{l}\text{Mass of an atom of Cu in grams is:}\\ \text{=}\frac{63.5\text{ amu }\times \text{ 1}\text{.66}\times {\text{10}}^{-24}\text{ g}}{1\text{ amu}}=1.05\times {10}^{-22}\text{ g}\end{array}$

Conclusion

Thus, the mass in grams of one copper atom is $1.05\times {10}^{-22}\text{g}$ .