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9/24/2026CEM 141 Final Exam.pdf#############################################################################
141 Final Exam.pdfCEM 141 Final Exam.pdf##########################################
CEM 141 Final Exam
+2. - ANS-What is the formal charge on the sulfur in SO3?
100g and 1g separated by 5 meters.
(100)(1)/(25) = 4 - ANS-What two atoms would have the greatest gravitational forces? Two 10g
separated by 10 meters. Or, one 100g and one 1g separated by 5 meters?
m1m2/r^2
1s2 2s2 2p6 - ANS-What is the electron configuration of a nitride ion N3-?
Al+3Cl-1 - ANS-What is the formula for the compound formed between aluminum and chlorine?
always polar! - ANS-The molecule CH2Cl2 is..
Ar because it is the lightest mass of the three. - ANS-Would Ar, CH4, or N2 be moving fastest
on average?
Attractive forces between molecules are overcome. - ANS-When bromine melts, what is
happening?
Because both the alpha particles and the nucleus are positively charged and so the alpha
particle is repelled. - ANS-Why are alpha particles deflected by the nucleus?
Because iodine has a larger more polarizable electron cloud. The electrostatic attraction
between the iodine molecules requires more energy to overcome. - ANS-Why is the boiling
point of iodine higher than that of bromine?
Because there is an attractive force between the two atoms. - ANS-As two atoms approach
each other why does the PE decrease?
Both are the same. - ANS-In a system composed of two different molecules, one light and one
heavy. At the same temperature, which molecule has a lower kinetic energy?
T=KE
Both gravitational and electrostatic. - ANS-For a pencil sitting on a desk, what forces are acting
upon the pencil?
Br2 because it has stronger LDFs than F2 and therefore takes more energy to overcome the
LDFs when Br2 boils. - ANS-Does F2 or Br2 have the higher boiling point?
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141 Final ExamCEM 141 Final Exam.pdf####################################################################
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
9/24/2026CEM 141 Final Exam.pdf#############################################################################
141 Final Exam.pdfCEM 141 Final Exam.pdf##########################################
CEM 141 Final Exam
+2. - ANS-What is the formal charge on the sulfur in SO3?
100g and 1g separated by 5 meters.
(100)(1)/(25) = 4 - ANS-What two atoms would have the greatest gravitational forces? Two 10g
separated by 10 meters. Or, one 100g and one 1g separated by 5 meters?
m1m2/r^2
1s2 2s2 2p6 - ANS-What is the electron configuration of a nitride ion N3-?
Al+3Cl-1 - ANS-What is the formula for the compound formed between aluminum and chlorine?
always polar! - ANS-The molecule CH2Cl2 is..
Ar because it is the lightest mass of the three. - ANS-Would Ar, CH4, or N2 be moving fastest
on average?
Attractive forces between molecules are overcome. - ANS-When bromine melts, what is
happening?
Because both the alpha particles and the nucleus are positively charged and so the alpha
particle is repelled. - ANS-Why are alpha particles deflected by the nucleus?
Because iodine has a larger more polarizable electron cloud. The electrostatic attraction
between the iodine molecules requires more energy to overcome. - ANS-Why is the boiling
point of iodine higher than that of bromine?
Because there is an attractive force between the two atoms. - ANS-As two atoms approach
each other why does the PE decrease?
Both are the same. - ANS-In a system composed of two different molecules, one light and one
heavy. At the same temperature, which molecule has a lower kinetic energy?
T=KE
Both gravitational and electrostatic. - ANS-For a pencil sitting on a desk, what forces are acting
upon the pencil?
Br2 because it has stronger LDFs than F2 and therefore takes more energy to overcome the
LDFs when Br2 boils. - ANS-Does F2 or Br2 have the higher boiling point?
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CEM 141 Final ExamCEM 141 Final Exam.pdf####################################################################
