Chem 1115 Unit 2 Practice Problems

 

1.      Give the information requested for  65Zn2+

                                                                                    30

atomic number =                       __________

mass number =                         __________

# of protons =                             __________

# of neutrons =                           __________

# of electrons =                          __________

 

2.      A particular chemical species has 46 neutrons, 36 electrons, and a mass number of 81.  Give the information requested below:

 

Atomic number =     __________

# of protons =           __________

 

Nuclear symbol        __________

 

3.      Give the names for the following compounds.  (Note:  These are ones you should be able to name using the ions you have memorized.)

Na2CO3                                                                             Fe2O3

AgNO3                                                                                                         Ca3N2

BaCl2                                                                                                           Cl2O7

Al2(SO4)3                                                                                                   FeCl2

Mg(OH)2                                                                                                     Zn(C2H3O2)2

CS2

 

4.      Give the correct formula for the following compounds (Note: same as 3):

 

Silver sulfate                                                                     Iron (II) phosphate

Barium acetate                                                                 Cesium fluoride

Aluminum carbonate                                                         Ammonium sulfide

Sodium bicarbonate                                                          Sodium cyanide

Dinitrogen tetroxide                                                           sulfur trioxide

 

 

5.      Name the following compounds.  You may need the ion chart.

 

KMnO4                                                                                                        Na2SO3

Na2CrO4                                                                                                     CuO

Pb(SO4)2                                                                                                   (NH4)3PO3

PbSO4                                                                                                         Ca(ClO4)2

CoCl3                                                                                                           KClO

BiCl5                                                                                                            

 

6.      Write the formula for each compound.  You may need the ion chart.

 

Potassium phosphite                                                        Ammonium perchlorate

Tin (IV) carbonate                                                             Cadmium phosphate

Cobalt (II) bromate                                                            Copper (I) sulfide

 

7.      Give the name or formula for the following acids:

HBr (aq)                                                                            nitric acid

HCN (g)                                                                             hydrogen sulfide

H3PO4                                                                               carbonic acid

HCl (g)                                                                               sulfuric acid

 

8.      Urea, which contains 46.65% nitrogen by weight, is commonly used as a fertilizer in agriculture.  To grow wheat, 2.00 lbs of nitrogen are needed to produce 1 bushel of wheat.  Use dimensional analysis to calculate the number of tons of urea that Dr. Bailey must spread on her 152 acre wheat farm if she wants to produce 50.0 bushels of wheat per acre.  (2000 lb = 1 ton)