DETACH THIS SHEET AND USE AS A
COVER SHEET/SCRATCH SHEET.
KEEP YOUR WORK COVERED!
CH 100
120 pts
120 minutes
October 6, 2009
Cover Page
Exam 01
MAKE SURE YOU HAVE 4 PAGES INCLUDING THIS COVERSHEET. KEEP YOUR WORK COVERED.
BRIEFLY LOOK OVER THE QUIZ FIRST. DO NOT SPEND TOO MUCH TIME ON ANY ONE QUESTION. ANSWER
EACH OF THE QUESTIONS IN THE SPACE PROVIDED. PAY ATTENTION TO SIGNIFICANT FIGURES. SHOW
YOUR SET UP AND CALCULATIONS FOR CREDIT.
Equations you may need:
Energy:
KE = ½mv2
Cal = SHAmAΔT
ΔT = Tfinal - Tinitial
Constants you may need:
Avogadro’s Number of units =
6.02214199 x 1023 units.
Name__________________________ (1 pts)
CH 100
120 pts - Fall 2009 - Page 1 of 3
T A __________________________
120 minutes
October 6, 2009
Exam 01
08 pts 1) a) Convert the following numbers into exponential notation with the minimum precision that correctly
can be assured: 0.0000062 __________________ , (1 pts) 41,040,000 ____________________(1 pts)
b) Convert the following temperatures: - 67.0 EF = ___________ EC (2 pts) = ____________ K (1 pt)
c) 45.0 Km/L = ____________ miles/gallon ( 1 gallon = 4 quarts; 1 qt = 0.946 L ; 1 mile = 1.609 Km.)
Show your setup using conversion factors with units, significant figures! (3 pts)
03 pts 2) A bar of gold 2.00 x 2.00 x 4.00 inches on a side, a precious metal, with a density of 19.30 g/cm3
would weigh how many kilograms? (1 inch = 2.54 cm)
__________ kilograms
05 pts 3) a) Calculate the amount of heat a 800.0 gram iron knife blade at 1100.EC will transfer to a large body
of ice water at zero Celsius when it is tempered. (i.e. assume the water doesn’t change temperature.). b)
If 1 calorie = 4.184 joules, how many kilojoules is this. (Specific Heats cal/(gram x EC): Water = 1.000 ;
Iron 0.1100; Show precision with scientific notation.)
___________ calories
___________ kilojoules
08 pts 4) a) For the following reaction write the electron configurations (noble gas notation) for each species
and the charges of the on the ions formed:
______
_______
Ca
_____________
+
N
___________
ÿ
Ca
N
____________ || _____________
b) Write the formula for the compound formed: ______________ .(2 pts)
12 pts 5) a) The molecule phosphoric acid, H3PO4, is found in many cola drinks. How many atoms of Oxygen
are there? (1 pt) _____, How many atoms of Hydrogen? (1 pt) ________ b) What is the percent by
mass of oxygen in phosphoric acid, H3PO4? At. Wts: H = 1.008; P = 30.974, O = 15.9994.
%O = _________
c) What is the percent by mass of phosphorus in phosphoric acid, H3PO4?
% P = _________
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Name__________________________
CH 100
October 6, 2009
120 pts - Fall 2009 - Page 2 of 3
T A __________________________
120 minutes
Exam 01
30 pts 6) Complete the following with the correct word or phrase. (1 pt each response, except where
noted) a) An ionic bond is formed by ______________________ of electrons. b) A covalent bond is formed
by the _______________________ of electrons. c) A polar covalent bond occurs when _________________
______________________ d) Salad oil and vinegar salad dressing must be shaken before it is poured the result
is an example of a _________________________________. e) The sub-atomic particle having a negative
charge is the ____________; and occupies the smallest largest (circle) volume and has the least most
mass in an atom.
f) The _____________________ atom has no neutrons in its nucleus which consists of
_________________________ . g) Isotopes of an element are defined as atoms all of which have the same
___________________________ ; but which have ________________________________ . h) The mean
Atomic Weight given in the periodic chart is determined by ________________________________________.
i) The Atomic Number is equal to the number of ___________________ in a given nucleus and identifies the
___________ . j) Write the electron configuration of element 33: ____________________________________;
( 3 pts) it is a Metal
Metalloid
Non-metal (Circle) ; supply the noble gas core then complete its valence
shell drawing a vertical line between subshells and up (or down) arrows for electrons: [
___ ___ ___ ___ ___ ___ ___ ___ ___
] ___ ___ ___
(5 pts) k) The order of filling of orbitals in an atom reflects
_________________________ . l) The partial filling of the upper most subshell reflects which rule of electron
filling __________________________ ? m) The filling of a single orbital reflects the ___________________ .
n) The first ionization energy of atoms is a periodic property, it trends to higher lower (Circle) values going
down a group and to higher lower (Circle) values l-r across a period. o) The size of atoms is a periodic
property, it trends to smaller
larger (Circle) values going down a group and to smaller
larger (Circle)
values l-r across a period .
18 pts 7) Write the Lewis Dot structure and the VSEPR Structure indicating the expected angles and structure
determined by the electron regions for the underlined atom of a) nitric acid: HNO3 = HONO2 b) the nitrate ion,
NO3S1 ion; (hint: a charge on the ion means you need to add or subtract electrons = the charge.)
c) CO2 (O=C=O)
d) H2C=NH
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e) Draw the polarity arrow ( +ÿ) next to one clearly polar bond in at least 2 different compounds above. (2 pts)
Name__________________________
CH 100
120 pts - Fall 2009 - Page 3 of 3
T A __________________________
120 minutes
24pts 8) Complete the following with the correct word or phrase to complete the statement.
October 6, 2009
Exam 01
Balance the following equations:
(2 pts) a) ______ C5H10O
+
(2 pts) b) ______ H3CCH2NH2
______ O2
ÿ
+ ______ O2
______ CO2
+
______ H2O
ÿ ______ CO2 + ______ H2O + ______ N2
(2 pts) c) ______ Pb(NO3)2(aq) + ______ AlCl3(aq)
ÿ ______ PbCl2(s) + ______ Al(NO3)3(aq)
(2 pts) d) Write the net ionic equation for c):
e) Give the ion expected to form from each of the following elements:(1 pt ea) S _____, Br _____, N _____,
Li _____, Ba _____ f) Give correct formulas for the following compounds:(1 pt ea) g) Iron(II) chloride
____________, Manganese(III) oxide ___________ . h) Name the following covalent compounds: (1 pt ea)
N2O _______________________________
PCl5 _______________________________
BCl3 _______________________________
NO2 _______________________________
SF4 _______________________________
15 pts 9) Complete the problem below by supplying the requisite information: a) Calculate the quantity of
ethane (C2H6) and oxygen (O2) which must react to produce 80.00 grams of carbon dioxide along with some
quantity of water. (At. Wt. C = 12.011; H = 1.0078; O = 16.000) Important! Make sure the chemical equation
is balanced correctly!!
Balanced Chemical Equation:
Stoichiometry:
Molar masses:
Stoichiometric Masses:
Reacting Masses:
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