CHM130LL Lab 5

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CHM130

Lab 5

The Atomic Mass of Beanium

Name:

A. Data Table : Insert your Data Table here with your sample calculations. You must show at least one sample calculation per procedure step. (16 points)

Part I Data Table

Sample
Mass
(mg)
Number/Qty
Average
Mass
(mg)
Relative
Abundance
Relative
Weight
(mg)
Kidneybeanium 18725mg
25
749mg
25/75=.33

749mg*.33=247.17mg
Pintobeanium
11575mg
25
463mg
25/75=.33
463mg*.33=152.79mg
Blackeyedpeaium
9900mg
25
396mg
25/75=.33
369mg*.33=130.68mg

Beanium (total)

530.64

Sample Calculations:

Part II
Record your answer on the answer grid below. (3 points each)

Chemical Name
Chemical
Formula
Common Use
1
Sodium hydroxide
NaOH
Drain cleaner
2
Sodium bicarbonate
NaHCO3
Baking soda
3
Aluminum oxide
Al2O3
Sandblasting sand
4
Sodium hypochlorate
NaClO
Bleach
5
Aluminum sulfate
Al(SO4)3
Used in antiperspirant

6
Ammonium bromide
NH4Br
Used in photography
7
Ammonium chloride
NH4Cl
Used in photography 8
Ammonium carbonate
(NH4)2CO3
Smelling salts
9

CaCO3
Limestone/chalk
10
Sodium chloride
NaCl
Table salt
11
Calcium chloride
CaCl2
De-icer for snow on roads 12
Calcium hypochlorite
Ca(ClO)2
Swimming pool disinfectant
13
Ammonium nitrate
NH4NO3
Used in fertilizer
14
Ammonium phosphate
Na3PO4
Used in fertilizer
15
Calcium oxide
CaO
Used to make plaster 16
Carbon dioxide
CO2
Dry ice
17
Chromium oxide
Cr2O3
Green pigment in paints 18
Copper sulfate
CuSO4
Plant root killer
19
Iron(III) chloride
FeCl3
Etching solution
20
Magnesium carbonate
MgCO3
Athlete’s chalk
21

Mg(OH)2
Milk of Magnesia
22
Dinitrogen oxide

Gas in whipped cream cans
23
Potassium nitrate
KNO3
Saltpeter
24
Potassium permanganate
KMnO4
Used in water softeners

B. Follow-Up Questions:

Part I
1. How are isotopes of an element different from one another?
How are they the same? (10 points)
The isotopes of an element have the same amount of protons, but a different amount of neutrons, so they vary in size.

2. Are mass number and