answer hey drleano/docs/chem001/worksheet05_answers.pdfdisulfur decafluoride t. phosphorous...
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WORKSHEET#5, CHEM001 (Review and Chapter 6)
Name: ____________________________ Date: ___________________ 1. What does amu stand for?
2. What is the difference between an ion and an isotope?
➢ Though individual atoms always have an integer number of atomic mass units , the atomic mass on the periodic table is stated as a decimal number because it is an average of the various isotopes of an element.
3. A mystery element Y occurs as three isotopes. Analysis of a sample of Y showed:
Isotope Mass Percent Abundance
1 80.0 amu 55.0
2 71.0 amu 24.5
3 69.0 amu 20.5
Calculate the average atomic mass of Y. [8 pts.]
Page 1 of 7
ANSWER HEY
atomic mass units
ion = variable electron # # PROTONS NEVER CHANGE FORAN
isotope = variable neutron #ELEMENT OF ONE
TYPE
75.54 → 75.5am①
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4. Complete the following table.
Chemical
System
Isotopic
Notation
Atomic
Number
Mass
Number
Number
of
Protons
Number
of
Neutrons
Number
of
Electrons
Sr2+ 89
12 26 10
Cr 27
9 10 10
11 23 11
5. Look up what the four most common isotopes of iron are in nature on Wikipedia (hint:
Google “Isotopes of Iron”). What are they and how many neutrons do each of them have? Based on their percent abundance given by Wikipedia, calculate the standard (average) atomic weight of iron.
6. Mark on the highlighted columns of the periodic table below what charge ions originating
from that column will have.
Page 2 of 7
839g Sr 38 38 51 36
Mg"
Emg
12 14
Ifor 2451 24 24
F-Ioff 9 19
Na 73 Na 11 12
( 0.0584 )( 54 ) -110.91754 ) ( 56 ) -1(0.02119/157)+(0.00286×58)=55.9l0a↳ see CIAAW " UNCERTAINTY "& WIKI PAGE ON
"
STANDARD ATOMIC WEIGHT"
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7. What would be the systematic name of HCl placed in water? What would it be if anhydrous?
In water: ______________________________________
Not in water: ___________________________________
8. If calcium and phosphorous were to chemically combine, what would be the correct formula
of the compound formed and its systematic name?
Formula: _____________________ Name: ______________________
9. If aluminum and sulfate were to chemically combine, what would be the correct formula of
the compound formed and its systematic name?
Formula: _____________________ Name: ______________________
10. Write the formula and name of the compound that will be formed between these elements:
a. Al and S
Formula: _____________________ Name: ______________________
b. H and F Formula: _____________________ Name: ______________________
c. K and N Formula: _____________________ Name: ______________________
d. Sr and O Formula: _____________________ Name: ______________________
e. Cs and P Formula: _____________________ Name: ______________________
f. Al and Cl Formula: _____________________ Name: ______________________
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hydrochloricacid
hydrogen chloride
Cats: calcium phosphidef
NOT SULFUR . THIS IS THE POLYATOMIC ANION .
API@0453 aluminum sulfate
APIS} aluminum sulfide
HF hydrogen fluoride
KSN potassium nitride
Sno strontium aide
Cssp cesium phosphide
At Cls aluminum chloride
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11. Write formulas for the following:
a. Calcium chloride
b. Magnesium oxide
c. Barium phosphide
d. Magnesium nitride
e. Lithium oxide
f. Calcium bromide
g. Strontium chloride
h. Calcium sulfide
i. Ferric chloride
j. Ferrous chloride
k. Cuprous chloride
l. Cupric chloride
m. Tin (IV) chromate
n. Tin (II) fluoride
o. Chromium (III) bromide
p. Copper (I) oxide
q. Carbon monoxide
r. Carbon dioxide
s. Disulfur decafluoride
t. Phosphorous pentachloride
u. Sodium hydrogen carbonate
v. Sodium hydrogen sulfide
w. Sodium potassium sulfate
x. Sulfur dioxide
y. Calcium nitrite
z. Sodium oxide
aa. Copper (II) sulfate
bb. Hydrochloric acid
cc. Hydrogen chloride
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catch Cut :O"
Mg "O"
CO
Ba4p3-
CO23 2
Mg }tNE Szfzo
Lito " PCGcat'BrI
NaHC03sick Na HS
Zt 2-
Cas NAHSOYFe
Cts502
Feck Ca ( NodaCua Naf
Cache Ca"
§04)Sn "( Crop )z HCl in water-12Snfz
HClCrist Brj
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12. Name the following compounds. Assume all acids are in water:
a. FeS
b. PbI2
c. SnF4
d. Fe 2O3
e. CuO
f. HI
g. HBr
h. HCl
i. H2SO4
j. HC2H3O2
k. H3PO4
l. H2CO3
m. PbO2
n. PBr2
o. I4O9
p. SiCl 4
q. P4S7
r. IF6
s. S2F10
t. HNO3
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' mouth sulfide hydrogen phosphatelead LI ) iodide carbon're acidtin (E) fluoride lead (E) aide
iron (E) wide Pb Bra lead (E) bromide
Copper ) Oxide tehaiodinenonaeide
hydrofluoric acid silicon tetrachloridehydralhomie acid tetraphasphmausheptnchlou.de
hydrochloric aid iodine hexafluorideThis one toosufomupligatead;D . answer was disulfmdeeafluouik
hydrogen acetate hydrogen nitrate
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13. Complete the table, filling in each box with the proper formula and name.
SO42- OH- AsO43- C2H3O2- CrO42-
NH4+
Ca2+
Fe 3+
Ag +
Cu 2+
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(NH 4)2604) NHYOH
(NH4)zfAs04)(NHy)kzHs0a)dH4hCr04
ammonium ammonium
Sulfateammonium ammonium ammonium
hydroxide arsenide acetate chromate
Casa , CACOH)z
CasAs04)zCa(czHzOdz
CaCr04
calcium cabins Calvin Calum calaissulfate hydroxide arsenate awhile chromate
Feds 0433 Fe (OH)z Fe Addy FeKzHs0ds Federals(E)
ironyiron#lion LED lion ( It ) lion LEDSulfate hydroxide Arsenate acetate chromateAg 2504 AglOH) AgsAsap . AgkzHsOd Aga Croy( I ) silvery semen stunt ) silmtt ) silnntt )sulfate hydroxide arsenate acetate chromate
Casal Cul OH)z Cuzftsoy) a Culcdtsodz CuCr04(E) copper # cappn.CH copper # copper LII ) Cappel'Dsulfate hydroxide arsenate acetate chromate
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14. [SIG FIGS] Multiply the following numbers and report the answer to the correct number of sig figs.
x 10 10.0 1.80 x 10-3 40000
14.6
15.0
0.15
4.180
15. [PRECISION] Add the following numbers and report them to the correct precision.
+ 10 10.0 358 1.80 x 10-3 40000
14.6
15.0
0.15
4.180
16. [SCI NOTATION] Write the following numbers in scientific notation with correct SFs.
a. 1800000
b. 3400002
c. 1555.90
d. 0.0000000067 17. [UNIT CONVERSION] Convert the following units.
a. 14.6 J = _______________ kJ
b. 101 °C = ________________ °F
c. 201 °C = ________________ °K
d. 0.673 m3 = ______________ cm3
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100 146 2.63×10-2 600000
200 1.50×102 2.70×10-2 600000
2 1.5 2.7×10-4 6000
40 41.8 7.52×10-3 20000
20 24.6 373 14.6 40000
30 25.0 373 15.0 40000
10 10.2 358 0.15 40000
10 14.2 362 4.182 40000
www w
1.8×106 1.55590×103www www
3.400002×1066.7×70-9
0.0146 474
14.6J xtOR 1.46×10-2
1000J
214 6.73×105
1003cm 's0.673ms × - → 673,000cm '
13 m3