CHEM 103 FINAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS
how many neutrons are in a neutral atom of thorium - Answer: 140
how many protons are in a neutral atom of argon - Answer: 18
how many outer shell electrons does silicon have - Answer: 4
how many bonds does carbon normally make - Answer: 4
how many bonds does nitrogen normally make - Answer: 3
how many electrons are in the calcium ion - Answer: 18
how many bonds does hydrogen normally make - Answer: 1
whole milk contains water, milk sugar (lactose), milk fat and various other water soluble substances.
milk is - Answer: a mixture
which of the following is not a compound - Answer: Kr
the molecular shape (not the electronic shape) around a nitrogen that has three other atoms
bonded to it and one lone pair is - Answer: trigonal pyramidal
the molecular shape (not the electronic shape) around a sulfur that has a double bond to one oxygen
and single bonds to two other oxygen is - Answer: trigonal planar
how many atoms are in the molecule of toluene - Answer: 15
is vegetable oil hydrophobic or hydrophilic - Answer: hydrophobic
, which of the following functional group is found in the molecule shown to the right - Answer: an
ester
here are four sketches at the molecular level of samples of matter. decide whether each sketch
shows a sample of an element, a compound, or mixture - Answer: C. mixture, element, compound,
element
which of the following functional groups is found in this molecule - Answer: carboxylic acid
how many carbons in this molecule - Answer: 6
how many hydrogens are on the carbon labeled C - Answer: 0
what is the shape around the atom pointed to by the arrow labeled C - Answer: trigonal planar
how many hydrogens are on the carbon labeled B - Answer: 1
what is the shape around the atom pointed to by the arrow labeled A - Answer: tetrahedral
which, if any, of the carbons in the structure above are stereocenters, i.e. able to make a pair of
stereoisomers - Answer: B
if lone pairs were drawn around the oxygens (either one), how many pairs should be drawn -
Answer: 2
which list gives the components of dry air - Answer: N2, O2, Ar, CO2
which of the following is not a major component of sea water - Answer: hydrogen gas (H2)
how many electrons (bonding and non bonding) should be in the final correct Lewis structure of
ethyl acetate (C5H10O2) - Answer: 42-49
AND CORRECT DETAILED ANSWERS
how many neutrons are in a neutral atom of thorium - Answer: 140
how many protons are in a neutral atom of argon - Answer: 18
how many outer shell electrons does silicon have - Answer: 4
how many bonds does carbon normally make - Answer: 4
how many bonds does nitrogen normally make - Answer: 3
how many electrons are in the calcium ion - Answer: 18
how many bonds does hydrogen normally make - Answer: 1
whole milk contains water, milk sugar (lactose), milk fat and various other water soluble substances.
milk is - Answer: a mixture
which of the following is not a compound - Answer: Kr
the molecular shape (not the electronic shape) around a nitrogen that has three other atoms
bonded to it and one lone pair is - Answer: trigonal pyramidal
the molecular shape (not the electronic shape) around a sulfur that has a double bond to one oxygen
and single bonds to two other oxygen is - Answer: trigonal planar
how many atoms are in the molecule of toluene - Answer: 15
is vegetable oil hydrophobic or hydrophilic - Answer: hydrophobic
, which of the following functional group is found in the molecule shown to the right - Answer: an
ester
here are four sketches at the molecular level of samples of matter. decide whether each sketch
shows a sample of an element, a compound, or mixture - Answer: C. mixture, element, compound,
element
which of the following functional groups is found in this molecule - Answer: carboxylic acid
how many carbons in this molecule - Answer: 6
how many hydrogens are on the carbon labeled C - Answer: 0
what is the shape around the atom pointed to by the arrow labeled C - Answer: trigonal planar
how many hydrogens are on the carbon labeled B - Answer: 1
what is the shape around the atom pointed to by the arrow labeled A - Answer: tetrahedral
which, if any, of the carbons in the structure above are stereocenters, i.e. able to make a pair of
stereoisomers - Answer: B
if lone pairs were drawn around the oxygens (either one), how many pairs should be drawn -
Answer: 2
which list gives the components of dry air - Answer: N2, O2, Ar, CO2
which of the following is not a major component of sea water - Answer: hydrogen gas (H2)
how many electrons (bonding and non bonding) should be in the final correct Lewis structure of
ethyl acetate (C5H10O2) - Answer: 42-49
