Transcript Slide 1

Challenge 5
T. Trimpe 2008 http://sciencespot.net/
Use the formulas provided to determine the number of
atoms of each element in each compound.
1. 5Zn(OH)2
2. 3UF4
3. 2Sn(CrO4)2
4. 3Pb(NO3)2
5. 2NH4NO3
Remember to list each
element’s symbol and tell the
number of atoms for each!
The answers are …
1. 5Zn(OH)2 Zn = 5 O = 10
2. 3UF4
U=3
H =10
F = 12
3. 2Sn(CrO4)2 Sn = 2
Cr = 4
O = 16
4. 3Pb(NO3)2 Pb = 3
N=6
O = 18
5. 2NH4NO3 N = 4
H=8
O=6