Tues 6-2 By the end of the day your grades should be updated. Check your grades for any errors, and if you turned in any late/absent work, make sure has been entered. This site may help you calculate your average:
ALL LATE/ABSENT WORK MUST BE TURNED IN BY FRIDAY 5-29
The review week quizzes will be given during lunch on Weds 5-27 (stoichiometry and heat) and Friday 5-29 (radioactivity and half lives). You may take these to raise your average.
.
Juniors and Sophomores will take a test while the seniors take their exams.
You may use the senior study guide to review the questions on radioactivity
and atomic structure.
Weds 5-20 Give the following electron configurations:
1) Si 2) Ca 3) Co 4) Se 5) Pd 6) Sb 7) Au
.
Mon 5-18 p 334 #14, 15, 16, p 350 # 1-9
. p 355 # 1-6, p 362 # 1-6
.
Fri 5-15 Read and outline chapter 9
.
Thurs 5-14 Read and outline chapter 8
. Bring your book to class!!!!
.
Tues 5-12 Solve these problems:
1) If 190 grams of Reginium is left after 28 hours, how much Reginium
was there initially. Assume the half-life of Reginium is 22 hours,
2) If 283 g of Scotesium decays with a half-life of 11.6 minutes,
how much Scotesium will be left after 84 minutes?
3) 894 grams of Sophomorium decays into Juniorium with a half life
of 365 days. How much Juniorium will have formed after 46 days?
.
Mon 5-11 Complete these nuclear equations:
. 1) 9Li > e-1
. 2) 257No > 253Fm
. 3) 201Hg + e-1 >
. 4) > 118I + e+1
.
Fri 5-8
1) An ion has 49 protons, 46 electrons and 66 neutrons.
Give the symbol and tell if it is a common or rare isotope.
2) An ion has a mass number of 51 and an atomic
number of 23 and has a +2 charge. Give the number
of protons, electrons and neutrons and its symbol
and tell if it is a common or rare isotope.
3) An ion has 52 protons, 54 electrons and 75 neutrons.
Give the symbol and tell if it is a common or rare isotope.
4) 75As -3 Give the number of protons, elec-
trons and neutrons and tell if it is a
common or rare isotope.
.
Weds 5-6 Bring your textbook to class!!!!!!!!!
.
Tues 5-5 Bring your textbook to class!!!!!!!!!
.
Fri 5-1 Test on stoichiometry, gas laws and heat. Your study guide is
. available in documents as study guide for test on gas, heat and stoichiometry.
Weds 4-29 Heat of candle lab due
.
Mon 4-27 Boyle's law lab due
. Popcorn lab due
You react 3285 g of HCl with 1920 g Fe
2O
3 and produce steam and FeCl
3
. 1) Delta H = ?
. 2) Is the reaction exothermic or endothermic?
. 3) How much heat is produced/ required?
. 4) How many formula units of FeCl3 are produced?
.
.
Thurs 4-23 Bring an uncooked bag of microwave popcorn to class.
.
Tues 4-21-09 1792 liters of nitrogen at STP reacts with 420 g of hydrogen.
. 1) How many moles of NH3 form?
. 2) How many molecules of NH3 form?
. 3) How many grams of NH3 form?
. 4) How many liters at STP of NH3 form?
. 5) If you collect 2004 g of NH3 what is the percent yield?
. 6) If you collect 6.0 x 10 25 molecules of NH3 what is the percent yield?
. 7) If you collect 3006 liters of NH3 what is the percent yield?
. 8) How many moles of excess are used?
. 9) How many moles of excess are not used?
.
Mon 4-20 Do these problems over the break to keep from forgetting.
. p 260 #12, 13, 14, 15, 17, 18, 19, 20
. p 302 # 16, 18, 19, 20, 21, 22, 23
. If you need extra practice here are some problems you can do:
. p 225 #2,4,6, p 231 # 4,5,6,8,10, p 246 #1-6,9-10,
. p 254 #1-8, p 273 #4,5,6 p 291 #4,5,6,8,9,10
.
Weds 4-8 p 284 # 1-7
.
Tues 4-7 p 277 #1-5
.
Tues 3-31 Read and outline chapter 7
. Pop bottle lab due for H
.
Fri 3-27 pop bottle lab due for D
.
Tues 3-24 p 242 #1-10
.
ALL LATE/ABSENT WORK MUST BE TURNED IN BY THE END OF THE DAY WEDNESDAY 3-18-09
.
Tues 3-17-09 Test on stoichiometry.
Your study guide is in documents as Stoichiometry
test study guide.
You also may take the retake quiz after school.
.
3-16 Answers to the play test done in class
. 2) LR = aluminum sulfide
. 3) excess = titanium (IV) bromide
. 4) 30 moles 5) 40 moles 6) 3360 g 7) 10680 g
. 8) 30 moles 9) 18 moles 10) 11040 g 11) 6624 g
. 12) 1.8 x 1025 formula units 13) 1.08 x 1025 formula units
. 14) 1.8 x 1025 formula units 15) 2.4 x 1025 formula units
.
Tues 3-10-09 22710g of tantalum(V) selenide reacts
. with excess indium bromide.
. 1) Balance the reaction.
. 2) How many moles of excess are used?
. 3) How many grams of excess are used?
. 4) How many formula units of excess are used?
. 5) How many moles of tantalum bromide are formed?
. 6) How many moles of indium selenide are formed?
. 7) How many grams of tantalum bromide are formed?
. 8) How many grams of indium selenide are formed?
.
Weds 3-4-09 4200grams of aluminum cyanide react
. with 5220 g of tantalum (V) sulfide.
. 1) Balance the reaction
. 2-3) How many moles of each reactant are there?
. 4) Which reactant is the limiting reactant?
. 5-6) How many moles of each product form?
. 7-8) What mass of each product forms?
. 9-10) How many formula units of each product form?
.
Mon 3-2-09 The following question are due:
. p 193 #1-10
. p 212 #1-10
. p 254 #1-2
. p 259 #1-8
. p 260 #16 only
.
Thurs 2-26
Ten moles of cesium oxide reacts with 8 moles of chlorine gas.
. 1) Balance the reaction.
. 2) What is the limiting reactant?
. 3) What is the excess reactant?
. 4) How many moles cesium chloride form?
5) How many moles of oxygen form?
Tues 2-24 BRING YOUR BOOK TO CLASS!!!!
.
Mon 2-23 S'more lab is due.
Solve these stoichiometry problems:
99 moles of tin (IV) fluoride reacts with 120 moles of lithium
nitride producing lithium fluoride and tin nitride.
1) Give the balanced equation for the reaction.
2) Which reactant is the limiting reatant?
3) Which is the excess reactant?
4) How many moles of lithium fluoride form?
.
Friday 2-20 Test on all the material covered so far this quarter.
Your study guide is in documents as test 4 study guide.
.
Weds 2-18 period D p 215-216 #1-18
.
Tues 2-17 Read and outline chapter 6
Period H p 215-216 #1-18
.
Fri 2-13 Percentage of sugar in bubble gum lab due.
Tues 2-10 Period D bring book to class.
.
Weds 2-4 Answer these questions:
1-2)Give the empirical and molecular formulas of these compounds
1) 20.168% carbon and 79.832% fluorine, molar mass =238g
2) 90% carbon and 10 % hydrogen, molar mass = 80g
3) Give the percent composition of aluminum cyanide.
.
Tues 2-3 Give the percent composition of these compounds:
1) iron (III) carbonate 2) aluminum nitrate
3) titanium (IV) sulfate 4) diphosphorus pentoxide
5) disilicon hexabromide 6) carbon dioxide
.
Mon 2-2 p 130 #1-10, p 136 #2, 4-10
.
Thurs 1-29 Chemical reaction lab due
.
Weds 1-28 Read and Outline chapter 4
.
Tues 1-27 Give the atomic mass, molecular mass or formula mass
for these substances. SHOW YOUR WORK!!!!
1) silicon 2) radium selenide 3) copper (II) phosphide
4) galium sulfate 5) technetium (VII) hydroxide
.
Fri 1-23 Give the atomic mass, molecular mass or formula mass
for these substances. SHOW YOUR WORK!!!!
1) tungsten 2) stromtium arsenide 3) iron (III) iodide
4) barium phosphate 5) titanium (IV) nitrate
ALL LATE HOMEWORK
MUST BE TURNED IN BY
FRIDAY JANUARY 9
YOUR STUDY GUIDE FOR THE SEMESTER 1 FINAL IS IN
DOCUMENTS AS Final Semester 1 Study Guide.
Seniors if your semester average is A or A- you will not have to take
the final!!!!
An extra credit project that you can do over the break is available in
documents.
Thurs 1-8 Meet the elements lab due
Weds 1-7 Bring your book to class. I will check your notebooks while
you work on an assignment.
Mon 1-5 Periodic Table lab due
Thurs 12-18 If you were absent for the test on 12-11 or wish to try to raise
your grade on the test given on 12-11, you may take a retest. It will
be given after school.
Weds 12-17 Balance the equations for these reactions:
1) ammonium diphosphate reacts with aluminum carbonate
2) ammonium silicate reacts with aluminum acetate
Tues 12-16 p90 #1-6, 9, 10
p 96 #1-9
p 100 #1-10
Bring scissors, tape/glue and a large sheet of paper to class.
Thurs 12-11 Test 3 Your study guide is in documents as test 3 study guide.
Your test has 33 questions and one extra credit problem. In addition
to the problems on the study guide, you should understand and be able
to use these words: reactants, products, solution, solvennt, suspension,
colloid, element, compound, heterogeneous, homogeneous, mixture,
atom, ion, charge, protons, electrons, neutrons, symbols, mass,
common and rare isotopes. Review your notes, homework, quizzes
and labs.
Weds 12-10 Bring your book
Tues 12-9 Balance these reactions AND tell the type of reaction. Assume all
reactions occur.
1) lithium nitride reacts with fluorine
2) magnesium arsenide reacts with aluminum fluoride
3) hafnium reacts with chlorine gas.
4) vanadium (V) oxide reacts with chlorine
5) manganese (VII) nitride decomposes
Thurs 12-4 Period H ONLY Write the balanced reaction for:
1) sodium bromide reacts with titanium sulfide
2) sodium selenide reacts with germanium chloride
3) yttrium fluoride reacts with strontium sulfide
Weds 12-3 Period D ONLY Write the balanced reaction for:
1) sodium bromide reacts with titanium sulfide
2) sodium selenide reacts with germanium chloride
3) yttrium fluoride reacts with strontium sulfide
The answer to the problem done in class is Ga2O3 + 3MgF2 <=> 2GaF3 + 3MgO
Tues 12-2 Write the balanced reaction for
1) strontium sulfide reacts with radium oxide
2) sodium fluoride reacts with francium chloride
Mon 12-1 Per D The answer for the last problem done in class is:
InAs + AlP <=> InP + AlAs
Mon 11-24 Name these compounds:
1) Ce(CN)3
2) NH4Br
3) CeP2O7
4) Ba(OH)2
Balance these reactions:
5) lithium reacts with iodine
6) gold (III) oxide decomposes
Fri 11-21 Balance these reactions:
1) chromium carbide decomposes
2) indium chloride decomposes
Thurs 11-20 Chromatography lab due
p 71 #1-10 due
p 82-83 #1-21 due
Outline of chapter 3 due
Weds 11-19 Balance these reactions:
1) sodium reacts with oxygen
2) aluminum reacts with fluorine
Weds 11-5 Bead lab due. You must do 10 tests. You may do up
to 20 tests for extra credit.
Give the formula of these compounds:
1) francium selenide 2) indium chloride
3) magnesium sulfide 4) yttrium fluoride
Tues 11-4 1)19.78% of boron atoms have a mass of 10.013 amu
80.22 % of boron atoms have a mass of 11.009 amu
What is the mass of boron?
2) What charge would you expect Scandium to get?
Thurs 10-30 Graph of distillation due.
Tues10-28
1) Give the number of protons electrons, neutrons and the
symbol of the common isotope of mercury with
a charge of +2.
2) Give the number of protons electrons , neutrons and the
symbol of an isotope of phosporus with a mass of 32
and a charge of -3.
3) Give the number of protons electrons , neutrons and the
symbol of an atom of an isotope of nickel with a mass of 58
PERIOD D ONLY
page 55 #1-6,
page 61 #1-6
Thurs 10-23 AFTER SCHOOL YOU MAY TAKE A RETEST
OF THE MATERIAL ON THE TEST GIVEN ON 10-16.
I WILL COUNT THE HIGHER OF THE 2 GRADES.
Thurs 10-23 Draw the symbol including charge (if applicable)
mass and atomic number and tell if it is common or rare.
1) p=41 e=39 n=53 2) p=16 e=18 n=16
3) p= 26 e=26 n=32
ALL LATE/ABSENT WORK MUST BE TURNED IN BY WEDNESDAY, OCTOBER 22nd !!!!
Weds 10-22 Give the number of protons, electrons and neutrons
of an atom of the most common isotope of
1) Tantalum 2)Rhenium 3)Silver
4) Gold 5) Tin 6) Iodine
Tues 10-21 Read and outline chapter 2
Mon 10-20 Density of Unknown Liquid Lab due
Thurs 10-16 Test on all material covered so far this year.
Emphasis will be on the most recent material.
Your study guide is posted in documents as
test 2 study guide. The answers to the study guide are:
1) 8.19 x 100 g/ml 2) 8.6 x 101 g
3) 7.0 x 100 g/ml 4) 3.81 x 100 ml
5) 2.9206 x 102 g 6) 4.5 x 105 ml
7) 4.0 x 101 g 8) 1.2 x 10-2 km
9) 3.6 x 10-1 g 10) 2.20 x 10-6 hl
Weds 10-8 Density of solid lab due. After completing the lab and
your calculations answer this: Are your densities the
same? If not why not?
Tues 10-7 p 45 #1-12, p 46 #13-21, p 47 # 23-25
Fri 10-3 BRING YOUR TEXTBOOK
Thurs 10-2 p 42 1-8, 10
Weds 10-1 p 38#1-10
Tues 9-30 Measurement worksheets p 39,40, 61, 62 due
Give the answers to these problems in scientific notation with the
correct number of significant figures.
1) A sample of mercury is placed in a graduated cylinder and the
volume is determined to be 79.2 ml. The density of mercury is
13.6 g/ml. What is the mass of the sample?
2) The density of gold is 19.3 g/ml. What is the volume of a sample
with a mass of 9.37 g?
3) A sample of a substance is placed on a balance which then reads
42.61g. The sample occupies 16 ml. What is the density of the
sample?
Mon 9-29 Solve these problems:
Answers should be in scientific notation with the correct number of
significant digits
1) 80700cm = km
2) 0.0004560 liters = ml
3) 63.200 kg = g
DO NOT FORGET TO COME IN TO WORK ON YOUR LAB IF YOU HAVE NOT COMPLETED IT.
Mon 9-22 Bring all graded papers to class.
FRIDAY 9-19 ANY LATE OR ABSENT WORK THAT YOU WANT INCLUDED IN YOUR PROGRESS REPORT GRADE MUST BE TURNED IN BY THE END OF THE SCHOOL DAY
Thurs 9-18 Test on all material covered this quarter.
Your study guide is available in documents. It
is at the bottom of the list as test 1 study guide.
Weds 9-17 Complete study guide for class. Try to do it without your
notes using only your notecard.and then use your notes if necessary
Tues 9-16 Give the answers in scientific notation with the
correct number of significant digits.
1) 0.0007500 kg = g
2) 4600 liters = ml
3) 0.003000 dm = mm
Mon 9-15 p 31 #1-6, 10
28 km = mm
Fri 9-12 p 23 # 1-6, 8, 9
Thurs 9-11 p 16 #1-6, 8, 9, 10
Weds 9-10 p 8 #1-6
Mon 9-8 If 6 birds = 2 nests 1) How many cheeps are there if
8 nests = 5 eggs you have 15 birds?
3 eggs = 2 cheeps
2-3) If 8 eeks = 14 ghosts
13 creeps = 2 eeks
7 slimes = 3 ghosts
2) How many creeps are there if you have 19 slimes?
3) How many ghosts are there if you have 12 creeps?
Thurs 9-4 Give the answers in scientific notation with the correct number
of significant figures.
1) If 0.090 pens equals 50.0 apples, how many apples are in 75 pens?
2) How many orcs are in 46 blips if 11 blips = 2.00 orcs
Tues 9-2 Read and outline chapter 1 pages 1-44
Give answers in scientific notation with the correct number of significant
figures
1) 5.0/8.000 2) 60.000/16 3) 9.000/26
4) 174600/90.0 5) 3587/444.000 6) 4567/11.0
Here are some practice problems and their answers in case you need extra practice:
Give answers in scientific notation with the correct number of significant figures
1) 7.0/8.000 2) 30000/4000.0 3) 3.00/40.000
4) 200600/103 5) 200600.0/10.30
Answers: 1) 8.8 x 10 -1 2) 8 x 10 -1 3) 7.50 x 10 -2
4) 1.95 x 10 3 5) 1.948 x 10 4
Fri 8-29 Give the number of significant digits and underline each significant digit.
1) 980007 2) 900.008700 3) 900080007000
4) 0.000900080007000 5) 900800700.00
Thurs 8-28 Give the answers to the problems 1-4 in scientific notation.
1) 750/30 2) 6.0 x 109 / 5.00 x 103
3) 11.00 x 0.00400 4) 9.00 x 10-14 / 5.0 x 10-8
Here are 2 with the answers:
5) 460/23 = 2 x 101 6) 9.0 x 10 -17 / 6.000 x 104 = 1.5 x 10-21
Weds 8-27 Read pages x to xxiii. Bring in a safety contract
signed by you and a parent or guardian.
Mon 8-25 Bring in a copy of your contract signed by you and a
parent or guardian.
Thurs 5-29 Give the electron configuration of 1) P-3 2) Zr, 3) Zr+3
4) At-1 For 1-3 use the arrow method and for 4
use the superscript method
Weds 5-28 Give the electron configuration of 1) S, 2) Ca,
3) Ni, 4) Br
Tues 5-27 Read and outline chap 10
Thurs 5-22 Test on gas laws and molarity. Seniors-Your test
has 15 matching questions You may use the
senior's study guide # 13-20. Review your quizzes, labs
and homework and class notes.
Mon 5-19 Popcorn lab due
Weds 5-14
1-2) An unknown gas effuses 2.56 times faster than xenon.
1) What is the mass of the gas?
2) What is the name of the gas?
3) Compare the rates of effusion of radon and CH4
Tues 5-13 A 5.0 liter flask contains 7.6 g of fluorine gas at 25oC.
What is the pressure measured in kPa?
Fri 5-9 A sample of a gas occupies 50.0 L and has a temperature
of 77oC and a pressure of 200 kPa. This gas is allowed to
expand to 75 L and is cooled to -23oC. What will the new
pressure be?
Tues 5-6
1) A 3000 ml container is filled with gas at 152 kPa. A piston is
moved until the volume of the container is 5.53 liters. What will be
the new pressure?
2) A gas at 960 torr occupies 2.27 liters. The gas is allowed to
expand until the pressure is 70.7 kPa. What volume will the gas
occupy now?
Fri 5-2 Question 7 has been added below.
Convert: 6atm= torr
If 153ml of 2.1 M lithium nitrate is allowed to react with
26 ml of 3.8 M calcium phosphate...
1) Balance the reaction
2-3) Give the number of moles of each product formed
4) Give the number of moles of excess reactant that are used
5) Give the number of moles of excess reactant that are not used
6) If the lithium phosphate that was produced is dissolved in
450ml of water, what is the molarity of the resulting solution?
7) What is the partial pressure of nitrogen if the total pressure of a
mixture of gases = .95 atm. The mixture is made of oxygen with
a pressure of 152 torr and helium with a pressure of 26.66 kpa
and the nitrogen.
Thurs 5-1 If 160ml of 5.1 M potassium phosphate is allowed to react with
120 ml of 2.7 M calcium bromide...
1) Balance the reaction
2-3) Give the number of moles of each product formed
4) Give the number of moles of excess reactant that are used
5) Give the number of moles of excess reactant that are not used
6) If the potassium bromide that was produced is dissolved in
250 ml of water, what is the molarity of the resulting solution?
Weds 4-30 Read and outline chapter 7
If 40 ml of 3.4M lithium fluoride reacts with 60ml of 4.9 M
gallium oxide...
1-2) How many moles of each product will be produced?
3) If you dissolve the lithium oxide which was prduced in 4 liters
of water what will be the molarity of the resulting solution?
Thurs 4-24 Test on radioactivity Your study guide is available in
documents. It is listed as study guide test 7 and is the second from the bottom of the list.
Weds 4-16 Read and outline p140-146. Include sample problems
in your outline.
The alternate assignment for yesterday is given in 4-15
1) Uranium-235 is struck by a neutron and undergoes fission.
It produces 3 neutrons, tin-132 and one other product.
Write a equation for this and tell what the other product is.
2) Uranium-235 is struck by a neutron and undergoes fission.
It produces 2 neutrons, cesium-144 and one other product.
Write a equation for this and tell what the other product is.
Tues 4-15
ALTERNATE ASSIGNMENT:
Solve these problems:
1) If 749 g of Chemistrium decays with a half-life of 64 minutes,
how much Chemistrium will be left after 51 minutes?
2) 56.9 grams of Failium decays into Passium with a half life
of 21 seconds. How much Passium will have formed after 6
seconds?
3) If 499 grams of Studentium is left after 43.1 hours, how much Studentium
was there initially. Assume the half-life of Studentium is 7.8 hours.
Solve these problems:
1) If 190 grams of Reginium is left after 28 hours, how much Reginium
was there initially. Assume the half-life of Reginium is 22 hours.
2) If 283 g of Scotesium decays with a half-life of 11.6 minutes,
how much Scotesium will be left after 84 minutes?
3) 894 grams of Sophomorium decays into Juniorium with a half life
of 365 days. How much Juniorium will have formed after 46 days?
Fri 4-11 Plot your calculated radioactivity on your graph of the
simulated radioactivity.
Thurs 4-10 Graph your data for the radioactivity lab on graph paper.
Weds 4-9 p 350 #1-9
Tues 4-8 p322 #1-10
Mon 4-7 Read and outline p 313-322
Read chapter 9
Fri 4-4 Bring all graded papers to class.
Weds 4-2 The second retake quiz will be given after school.
Tues 4-1 Test on stoichiometry and heat and percent yield.
Your study guide is in documents.
The first retake quiz will be given after school.
ALL LATE/ABSENT WORK
MUST BE TURNED IN BY
MONDAY 3-31 IF YOU WANT
THE WORK INCLUDED IN
YOUR THIRD QUARTER
GRADE!!!!!
Over Easter break you may earn extra credit by visiting two museum
exhibits. One is at the Field Museum and is about George
Washington Carver (an early industrial/agricultural chemist).
The other exhibit is at the Museum of Science and Industry
and and is called The Glass Experience.
Weds 3-19 Birthday candle lab due
Thurs 3-13 Solve: 560 g of C2H4 burn (complete combustion) in 22400
liters of oxygen.
1) Balance the reaction.
2) Calculate delta H
3) Is the reaction exothermic or endothermic?
4) How much heat is produced/required in the reaction?
Mon 3-3 Outline of chapter 6 due
Thurs 2-28 S'more lab due
If you combine 6200 g of sodium hydroxide with 2450 g of
sulfuric acid and collect 60 g of H2O, what is your percent yeild?
Here is a practice problem: If 4592 g of sodium phosphate reacts with
6.02 x 1025 f. un. of barium chloride and 8000 g barium phosphate
is collected, what is the percent yeild? Answer: 95% If 51 moles
of NaCl are collected what is the percent yeild? Answer: 61%
Tues 2-26 BRING YOUR BOOK!!!
Mon 2-25 Bring all graded papers to class!!
Fri 2-22 ALL LATE/ABSENT WORK MUST
BE TURNED IN!!!!
Weds 2-20 Bring your book to class.
Tues 2-19 Test on stoichiometry, percent composition, empirical and
molecular formulas. You must be able to write balanced
equations for reactions. YOUR STUDY GUIDE IS IN
DOCUMENTS!
Weds 2-13 You burn 484 g of propane (C3H8) in 12800 g of oxygen.
1) Give the balanced reaction.
2) What is the limiting reagent?
3) What volume of CO2 is produced? (Assume it is at STP)
4) What mass of CO2 is produced?
5) What mass of H2O is produced?
6) What mass of excess is used?
7) What mass of excess is not used?
Practice Stoichiometry Problem This is not homework.
The answer will be given below 1-23
33 moles of tin(IV) nitrate reacts with 30 moles of copper(II)phosphate
1) balance the reaction
2)What is the limiting reactant?
3)What is the excess reactant?
4-5)How many moles of each product form?
6) How many moles of excess is used?
7) How many moles of excess is not used?
Mon 2-11 Gum lab due
Show all work.
1-2) A compound has a molar mass of 4088 grams and contains
8.22% carbon
26.03 % fluorine
65.75% tellurium
1) What is the empirical formula?
2) What is the molecular formula?
3-4) A compound has a molar mass of 3920 grams and contains
6.122 % carbon
81.63 % bromine
12.24% sulfur
3) What is the empirical formula?
4) What is the molecular formula?
Fri 2-8 1) What is the percent composition of iron (III) pyrophosphate?
2) Give the empirical formula of a compound that contains
53.333 g carbon
11.111g hydrogen
35.556 g oxygen
3) Give the empirical formula of a compound that contains
63.158 g carbon
8.772 g hydrogen
28.07g oxygen
Tues 2-5 Give the percent composition by mass of these compounds:
1) gold (III) orthosilicate
2) iron (III) nitrate
3) titanium (IV) arsenate
4) copper (II) carbonate
Thurs 1-31 If 900 moles of Barium chloride react with 600 moles of
Titanium (IV) phosphate ...
1) Balance the reaction
2) What is the limiting reactant?
3) What is the excess reactant?
4-5) How many moles of each product are formed?
6) How many moles of the excess reagent are used?
7) How many moles of the excess reagent are not used?
Weds 1-30 If 600 moles of Iron (III) fluoride react with 300 moles of oxygen...
1) Balance the reaction
2) What is the limiting reactant?
3) What is the excess reactant?
4-5) How many moles of each product are formed?
Tues 1-29
Lithium reacts with bromine to form lithium bromide.
1-3) If you have 40 atoms of lithium and 40 molecules
of bromine...
1) Which is the limiting reactant?
2) Which is the excess reactant?
3) How much product will form?
4-6) If you have 6 moles of lithium and 6 moles of
bromine molecules...
4) Which is the limiting reactant?
5) Which is the excess reactant?
6) How much product will form?
Mon 1-28 Read chapter 6
Lab due. Your lab consists of your data, the answers to the
questions below and the balanced equations
for the all of the reactions that formed a precipitate.
1) For each of your balanced reactions list the reactants.
2) For each of your balanced reactions list the products.
3) How could you tell that a reaction happened here?
Weds 1-23 Bring a ruler to class.
Answers to the stoichiometry problem:
1) 3Sn (NO3)4 + 2Cu3(PO4)2 > Sn3(PO4)4 + 6Cu(NO3)2
2) Sn (NO3)4
3) Cu3(PO4)2
4-5) 11 moles Sn3(PO4)4 and 66 moles Cu(NO3)2
6) 22 moles Cu3(PO4)2
7) 8 moles Cu3(PO4)2
Tues 1-15-08 Final Exam You can download your study guide from documents. There are
58 practice questions and a list of topics and terms that you should know. Try to complete the study guide during Christmas vacation.
Weds 1-9-08
1) 97.3 g iron(III)sulfate = f.un.
2) 5.49 x 1024 f.un. ammonium carbonate = g
3) 784 moles of sodium = ions
Tues 1-8-08
1) 6.622 x 1024 molecules of CBr4 = g
2) 389 g of calcium nitrate = formula units
3) 481 moles of aluminum carbonate = g
ALL LATE AND ABSENT WORK MUST BE TURNED IN BY FRIDAY 12-21-07
Fri 12-21 p136 #1-6, 8-10
Thurs 12-20 Bring your graded papers!
Weds 12-19 Give the mass of 1 mole of
1) calcium phosphide 2) titanium (IV) oxide 3) calcium hydroxide
Tues 12-18 Read and outline chapter 4
Fri 12-14 BRING YOUR BOOK!!!
Weds 12-12 Complete test on balancing and chemical reactions
Tues 12-11 Test on balancing and chemical reactions If you have lost your study guide you can download one from documents.
Thurs 12-6 p 188 # 1-6, 9,10
Balance the equations for the combustion of these com:pounds:
1) C12H24
2) C12H22O5
Weds 12-5 Read and outline chapter 5
Tues 12-4 Periodic Table Lab due
Mon 12-3 p 179 #1,2,3,4,6,8,10
Fri 11-30 1) manganese (VII) oxide reacts with sodium nitride
2) manganese (VII) oxide reacts with fluorine
3) manganese (VII) oxide reacts with aluminum
4) manganese (VII) oxide decomposes
5) manganese reacts with nitrogen to form a compound that contains manganese with a charge of +7.
Thurs 11-29
BRING A LARGE SHEET OF PAPER, SCISSORS, AND TAPE OR GLUE!
Weds 11-28 Balance these reactions. Assume all reactions occur.
1) vanadium (V) oxide reacts with aluminum
2) rubidium reacts with nitrogen
3) niobium (V) nitride decomposes
4) chromium(VI) oxide reacts with gaseous iodine
5) chromium VI) fluoride reacts with germanium
6) chromium (VI) fluoride reacts with niobium (V) oxide
Here are some practice problems. Assume all reactions occur. The solutions are given on 11-1 below.
1) potassium reacts with oxygen
2) lead sulfide decomposes
3) sodium carbide reacts with oxygen
4)sodium carbide reacts with aluminum
Tues 11-20 Balance these reactions. Assume all reactions occur.
1) magnesium reacts with nitrogen
2) germanium nitride decomposes
3) gallium reacts with gaseous iodine
4) rubidium reacts with sulfur
Here is another practice problem for formulas:
Lead sulfite (answer is given at 11-9 below)
Thurs 11-15 Test on chapter 2 and part of chapter 3
Weds 11-14 Complete study guide. If you lost your copy
you may download one from documents.
Tues 11-13 p 90 #1-7, 9, 10
p 96 # 1-10
Fri 11-9 Read and outline chapter 3
Answer for Lead sulfite Pb (SO
3)
2
You start with Pb2 (SO3)4 and reduce the subscripts by dividing by 2
Thurs 11-8 p 82 16-22
Weds 11-7 p 81 #1-15
Tues 11-6 p 76 # 1-7, 10
11-1 Answers for practice questions qiven on 11-19
1) 4K + O2 à 2K2O
2) Pb S2 à Pb + 2S
3) Na4C + 02 à 2Na2O + C
4) 3Na4C + 4Al à Al4C3 + 12Na
Weds 10-31 p 71 #1-6
Tues 10-30 p55 #1-6, p 61 #1-6
Mon 10-29 Read and outline chapter 2
Fri 10-26 Here are some practice problems. The answers are
given below.
1) 85 Rb +1Give the symbol and tell if it is a common
or rare isotope.
2) An ion has a mass number of 90 and an atomic
number of 39 and has a +3 charge. Give the number
of protons, electrons and neutrons and its symbol
and tell if it is a common or rare isotope.
3) 197Ir Give the number of protons, elec-
trons and neutrons and tell if it is a
common or rare isotope.
Answers: 1) p=37, e=36, n=48 common
2) p=39, e=36, n=51, rare
3) p=77, e=77, n=120 rare
Thurs 10-25
1) An ion has 49 protons, 46 electrons and 66 neutrons.
Give the symbol and tell if it is a common or rare isotope.
2) An ion has a mass number of 51 and an atomic
number of 23 and has a +2 charge. Give the number
of protons, electrons and neutrons and its symbol
and tell if it is a common or rare isotope.
3) An ion has 52 protons, 54 electrons and 75 neutrons.
Give the symbol and tell if it is a common or rare isotope.
4) 75As -3 Give the number of protons, elec-
trons and neutrons and tell if it is a
common or rare isotope.
Weds 10-24
1) An atom has 3 protons and 4 neutrons. Give the
symbol and tell if it is a common or rare isotope.
2) An atom has a mass number of 40 and an atomic
number of 19. Give the number of protons, elec-
trons and neutrons and its symbol and tell if it is a
common or rare isotope.
3) 55Fe Give the number of protons, elec-
trons and neutrons and tell if it is a
common or rare isotope.
Tues 10-22 Density Lab due
All work must be turned in by 10-19
if you wish to have it included in your
first quarter grade.
Thurs 10-18 TEST on everything covered since the last
test. You will still need to be able to do con-
versions, give answers in scientific notation
with the correct number of significant figures.
Work on your study guide. If you have lost your
study guide it is available in documents.
Tues 10-9 Give the answers to these problems in scientific notation
with the correct number of significant figures and units.
Show ALL work.
1) An object has a density of 1.4 g/ml and a volume of
3.0 ml. What is the mass of the object?
2) An object has a mass of 7.450 g and a volume of
3.14 ml. What is the density of the object?
3) An object has a density of 2.3 g/ml and a mass of
17.031g. What is the volume of the object?
Weds 10-3 Give the answers to the following metric conversions.
SHOW ALL WORK!!!
1) 72 ml = liters
2) 72 liters = ml
3) 72 dag = g
4) 72 dg = hg
Tues 10-2 Use the conversions below to convert 573Co/Wa into Mi/Ki
9Ro=12Ki 5Co=15Hi 2.7Wa = 5.4 Ob
1.7 Er=3.4 Mi 6Ki=11Go 14Mi=17Ba
20Er=25Hi 2 Ob=3Ro 12 Co=24Na
Show your set up. Give your answer in scientific notation.
Fri 9-21 Test on all material covered this quarter.
Thurs 9-20 Work all problems on the study guide.
Use the information given below to solve the questions.
5.00 mits = 11 pets 12 curs = 7.000 bells 8.0 dabs = 900 figs
7.2 dabs = 6.4 apes 3.00 apes = 7.1 eggs 13 mits = 0.006 curs
0.0040 pets=80.0 figs 2.00 eggs=17 noses 19.0 pets = 27 whines
Give the answers to these problems in scientific notation with
the correct number of significant figures:
1) How many figs are in 317.0 mits?
2) How many eggs are in 0.000452 pets?
Weds 9-19 Give the answers to these problems in scientific notation with the correct number of significant figures:
1) If 6.000 bits = 9.000 000 coops and 0.000 000 000300 coops
=1.30 000 dips, tell how many dips are equal to 4800.00 bits.
2) If 6.000 bits = 9.000 000 coops and 0.000 000 000300 coops
= 1.30 000 dips, tell how many bits are equal to 4800.00 dips.
Thurs 9-13 p 31 #1-10
Weds 9-12 p 23 #1-7, 9,10
Give answers in scientific notation with the correct number of significant
figures
1) 5.0/8.000 2) 60.000/16 3) 9.000/26
4) 174600/90.0 5) 3587/444.000 6) 4567/11.0
Tues 9-11 RETURN SIGNED FLINN SAFETY CONTRACT !
p16 #1-10
Here are some practice problems and their answers in case you need extra practice:
Give answers in scientific notation with the correct number of significant figures
1) 7.0/8.000 2) 30000/4000.0 3) 3.00/40.000
4) 200600/103 5) 200600.0/10.30
Answers: 1) 8.8 x 10 -1 2) 8 x 10 -1 3) 7.50 x 10 -2
4) 1.95 x 10 3 5) 1.948 x 10 4
Thurs 9-6 p 8 #1-10
Tues 9-4 Read and outline chapter 1 in your text
How many significant figures are in each number? Underline all significant digits.
1) 567
2) 0.000567
3) 567000
4) 50607
5) 500060007
6) 5.6007000
7) 5000600070000
8) 0.000506000070000
9) 500600.0070000
10) 50607000.000
Fri 8-31 Print out a copy of the class contract and bring it to class signed by you and a parent or guardian