Chapter 2 - Sections 2.1-2.9 - Exercises - Problems by Topic - Page 82: 90a

$141\ kg\ Cd $

1. Use Avogadro's number to convert from atoms to moles of cadmium. Then use the molar mass of cadmium to convert from moles to grams of cadmium. Finally, convert grams into kilograms. 2. $7.55\times10^{26}\ atoms\ Cd\times\frac{1\ mol\ Cd}{6.022\times 10^{23}\ atoms\ Cd}\times\frac{112.4\ g \ Cd}{1\ mol\ Cd}\times\frac{1\ kg\ Cd}{1000\ g\ Cd}= 141\ kg\ Cd $