Atoms & molecules test [30 points]   Chem

For problems involving calculations, show the relevant equation (or formula and conversion factor(s)), show your work in an organized manner.

1. fill-in the table. [10 points]

symbol

# protons

# neutrons

# electrons

charge

Atomic mass

65Cu 2+

 

 

 

 

 

 

47

 

 

+ 1

110

 

2. fill-in the table. [10 points]

Chemical name

Chemical formula

 

Fe(OH)3

Barium nitrate

 

 

P3Cl 8

Ammonium sulfate

 

 

S4Br6

 

3. A hypothetical sample of carbon contains 75.0 % 12C, 10.0 % 13C, and an unknown amount of 14C. Based on this information, determine the average atomic mass of carbon. [10 points]