Chemistry (7th Edition)

Published by Pearson
ISBN 10: 0321943171
ISBN 13: 978-0-32194-317-0

Chapter 2 - Atoms, Molecules, and Ions - Section Problems - Page 74: 119


The identity of "Z" is the element Palladium (Pd).

Work Step by Step

1. Convert the number of atoms to number of moles of atoms: $4.61 \times 10^{21} atoms \times \frac{1 mole}{6.022 \times 10^{23}atoms} = 0.00766$ $moles$ 2. Calculate the molar mass of the compound. $\frac{0.815g}{0.00766moles} = 106g/mol$ 3. Since the molar mass is numerically equal to the atomic weight, we can use a periodic table to identify the element with molar mass equal to 106g/mol. - It is Palladium (Pd)
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