Question

1.List three main factors which affect melting point of pure sample
:

B) select two factor and explain your answer

Answer #1

Main factors which affect the melting point of a pure sample (No impurity) are Molecular composition, the Molecular force of attraction, Shape of Molecules and Size of Molecules

**Molecular
composition**

A material has a higher melting point if molecules are tightly packed together, than a substance with molecules that do not pack well. Covalent bonds are also effects melting points. material with giant covalent structures has extremely high melting points because several strong covalent bonds must be broken before they can melt.

**Molecular
Size**

Molecular size affects the melting point. smaller molecules melt
at lower temperatures than larger molecules. For example, the
melting point of ethanol is -114.1 ^{o}C while the melting
point of the larger ethyl cellulose molecule is 151
^{o}C

d) List three factors that may affect International
Portfolio Investment and explain each factor in one
sentence.

When running melting point tests rank and explain which will
have the higher melting point, middle melting point, and lowest
melting point:
a.) Impure Phthalic Acid
b.) Pure Phthalic Acid
c.) Crystalline Phthalic Acid

A factorial experiment involving two levels of factor A and
three levels of factor B resulted in the following data.
Factor B
Level 1
Level 2
Level 3
Factor A
Level 1
137
88
75
167
64
93
Level 2
123
129
120
93
107
136
a) Test for any significant main effects and any interaction.
Use α = 0.05.
Find the value of the test statistic for factor A. (Round your
answer to two decimal places.)
Find the p-value...

A factorial experiment involving two levels of factor A and
three levels of factor B resulted in the following data.
Factor B
Level 1
Level 2
Level 3
Factor A
Level 1
135
89
76
165
65
94
Level 2
125
128
119
95
106
135
Test for any significant main effects and any interaction. Use
α = 0.05.
Find the value of the test statistic for factor A. (Round your
answer to two decimal places.)
___________.
Find the p-value...

The presence of an impurity can affect the observed melting
point of a sample in two different ways: certain impurities can
have only one, only the other, or both effects depending on what
the impurity is and how much is present. What are the two effects
(that is, how would the observed melting range change compared to
the literature value of the pure substance)?
a.
b.
One measures the amounts of lots of chemicals in a reaction,
including those that...

List and explain two factors that could affect the accuracy of
your value of RH. (R subscript H)

What is labor productivity? Please discuss the two main factors
which affect labor productivity.
What is per-worker production function? We know the production
function is a curve (not a
straight line). Why does it have that curvature?

The calculations for a factorial experiment involving four
levels of factor A, three levels of factor B, and three
replications resulted in the following data: SST = 284, SSA = 29,
SSB = 24, SSAB = 176. Set up the ANOVA table. (Round your values
for mean squares and F to two decimal places, and your
p-values to three decimal places.)
Source
of Variation
Sum
of Squares
Degrees
of Freedom
Mean
Square
F
p-value
Factor A
Factor B
Interaction
Error...

The calculations for a factorial experiment involving four
levels of factor A, three levels of factor B, and three
replications resulted in the following data: SST=286, SSA=24,
SSB=22, SSAB=185..
Set up the ANOVA table and test for significance using a=.05.
Show entries to 2 decimals, if necessary. If the answer is zero
enter “0”.
Source of Variation
Sum of Squares
Degrees of Freedom
Mean Square
F
p-value
Factor A
Factor B
Interaction
Error
Total
The -value for Factor A is...

The calculations for a factorial experiment involving four
levels of factor A, three levels of factor B, and three
replications resulted in the following data: SST = 282, SSA =
28,SSB = 23, SSAB = 173. Set up the ANOVA table. (Round your values
for mean squares and F to two decimal places, and your
p-values to three decimal places.)
Source
of Variation
Sum
of Squares
Degrees
of Freedom
Mean
Square
F
p-value
Factor A
?
?
?
?
?...

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