Chapter 3 Homework
Name _______________________
Isotope HW:
1. Name the element with 52 protons
2. Name the element with 83 protons
3. Write the subscript notation for silicon with 16 neutrons
4. Calculate the number of protons, neutrons, and electrons in Magnesium-27
5. Write the hyphen notation for platinum with 120 neutrons.
LOTS OF MATH PROBLEMS:
Molar Mass:
How many grams of each substance would be necessary to have 1 mole? Round all
answers to 3 sig figs.
1. P
6. Ni
2. Kr
7. C
3. Au
8. Cs
4. Sr
9. S
5. Mg
10. N
Gram to Mole:
How many moles of each substance are there?
11. 190 g Cu
16. 24.7 g Rb
12. 29 g Fe
17. 172 g Co
13. 122 g Ca
18. 88 g I
14. 391 g Pb
19. 93 g Br
15. 38 g W
20. 72 g C
Mole to Gram:
How many grams would be necessary to have the following number of moles?
24. 0.33 mol Cr
21. 0.5 mol Bi
22. 3.8 mol As
23. 8.9 mol As
25. 4.4 mol Na
Mole to Particle:
How many particles in the following numbers of moles?
26. 2.5 mol Au
29.
0.5 mol Sn
27.
28.
5.6 mol P
30.
7.1 mol C
4.1 mol Si
Particle to Mole:
How many moles in the following numbers of particles?
34.
5.5 x 10
31.
2.3 x 1024 particles H
32.
1.5 x 10
33.
9.99 x 10
23
particles Bi
particles Sr
15
particles O
35. 7.85 x 10
Gram to Particle:
How many particles in the following masses?
36. 190 g Cu
39. 391 g Pb
37. 29 g Fe
40. 38 g W
38.
28
6
particles Ne
122 g Ca
Particle to Gram:
What is the mass of the following numbers of particles?
41. 2.47 x 10 25 particles Rb
44. 9.3 x 1027 particles Br
42. 1.72 x 1021 particles Co
43.
8.8 x1035 particles I
45.
7.02 x 1036 particles Cl