Level 4: You are attempting to identify an unknown substance. Use the table to
answer the questions below.
Substance
Formula Mass,
Color
Physical
State
Density Boiling
. (g/cm) Point,'c
Methane
CH
16.0
Gas
Colorless
0.423
-161.5
Ammonia
NH
17.0
Gas
Colorless
0.70
-33
Unknown
???
???
???
???
PP?
???
Propane
CH
44.1
Gas
Colorless
0.493
-49.1
Bromine
Bry
159.8
Liquid
Red
4.04
58.8
Lithium
Li
6.94
Solid
0.534
1342
Silvery,
white
metal
Magnesium Mg
24.3
Solid
1.74
1090
Silver,
white
metal
Your goal is to identify what substance the unknown is. List 5 testa/observations you
could use to determine what the unknown substance in the chart is using your
knowledge of chemical and physical properties.
Test/Observations #1:
Test/Observations #2:
Test/Observations #3:
Test/Observations #4:
Test/Observations #5:
Answers: 1
Chemistry, 21.06.2019 15:00
Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.
Answers: 2
Chemistry, 22.06.2019 16:10
Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.
Answers: 1
Level 4: You are attempting to identify an unknown substance. Use the table to
answer the questions...
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