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WorksheetsHonors Chem I final exam
Total questions: 40
Worksheet time: 1hrs 1mins
What is the volume, in liters, occupied by 0.254 mol of O2 gas at 2.01 atm and 185.1 K?
(a)
Which compound listed below is nonpolar?
CO2
None of these
PH3
NaCl
A 375 mL sample of hydrogen is collected over water at 30 °C and 762.1 mm Hg pressure. What is the pressure of the dry gas alone in millimeters of mercury?
(a)
Perform this calculation to the correct number of significant figures.
(29.56 - 10.441) × 55.6 =
(a)
How many valence electrons does P have?
3
4
5
6
7
How much heat, in kilojoules, is required to melt 56.8 g of solid diethyl ether, C4H10O, at its melting point?
(a)
Which intermolecular forces are found in amonia, NH3?
(1) dispersion
(2) dipole-dipole
(3) H-bonding
1 only
2 only
3 only
1 and 2
all 1, 2, and 3
Rank the compounds NH3, CH4 and H2O in order of increasing boiling point.
CH4 < H2O < NH3
NH3 < H2O < CH4
H2O < CH4 < NH3
CH4 < NH3 < H2O
Express this number in decimal notation (i.e., express the number without using scientific notation).
8.70 × 10-5
(a)
Which of the following can be considered chemical property
bioling point
density
color
flammability
Hydrogen gas reacts with oxygen gas to form water vapor.
2 H2(g) + O2(g) → 2 H2O(g) ΔH = -483.5 kJ
Calculate the heat (in kJ) associated with the reaction of 8.65 g H2 with excess O2. Answer is absolute value
(a)
How many micrograms are in 6.21 x 10-6 kilograms?
(a)
How many electrons does the calcium ion (Ca2+ ) have?
22
18
20
40
What is the mass of 325 mL of a liquid that has a density of 0.780 g/mL?
(a)
What is the chemical formula for gallium nitrite?
Ga3NO3
Ga2(NO2)3
Ga(NO3)3
GaNO2
Ga(NO2)3
How many moles of O2 are required to react with 5.25 moles of C8H18 in the combustion of gasoline?
2 C8H18 + 25 O2 →16 CO2 +18 H2O
(a)
What is the name of K2SO4?
potassium(I) sulfate
potassium sulfite
potassium sulfate
potassium disulfate
dipotassium monosulfate
What is the mass, in grams, of 6.44x 1023 formula units of Be(NO3)2?
(a)
What is the molecular geometry of OCl2?
trigonal planar
linear
tetrahedral
trigonal pyramidal
bent
What is the mass percent of sulfur in K2S?
70.9%
1.41%
29.1%
3.43%
35.5%
Which of the following are not valid Lewis structure(s) for chloroform, CHCl3? (select all that apply)
How many grams of lithium are required to completely react with 524 mL of N2 gas measured at STP in the following reaction?
6 Li(s) + N2(g) → 2 Li3N(s)
(a)
What is the mass, in grams, of 0.725 moles of nitrogen gas?
(a)
What are the spectator ions in the following complete ionic equation? (select all that apply)
Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) → AgBr(s) + K+(aq) + NO3-(aq)
Ag+(aq)
AgBr(s)
K+(aq)
Br-(aq)
NO3-(aq)
Arrange the elements in order of decreasing atomic size:
K, P, F, Si
F > P > Si > K
Si > K > P > F
K > Si > P > F
F > P > K > Si
If 8.44 grams of copper metal react with 14.1 grams of silver nitrate, what is the mass of silver, in
grams, that can be theoretically produced?
2 AgNO3(aq) + Cu(s) → Cu(NO3)2(aq) + 2 Ag(s)
(a)
How many joules are required to heat 25.6 g of platinum from 34.7 °C to 51.3 °C?
(a)
How would you classify river water?
mixture- homogenous
mixture- heterogenous
pure substance- compound
pure substance- element
How many valence electrons are present in H3O+?
(a)
Which of the following compounds is SOLUBLE in water?
calcium carbonate
strontium carbonate
Copper(ll) carbonate
potassium carbonate
What is the atomic number for an element with 41 neutrons and a atomic mass number of 80?
39
41
80
121
What volume of methane gas at 273 K and 101.33 kPa do you have when the volume is decreased to 0.50 L, with a temperature of 300 K and a pressure of 151.99 kPa.
0.68 L
0.82 L
0.50 L
0.37 L
As the IMF strength increases, ____ decreases.
boiling point
melting point
surface tension
vapor pressure
viscosity
The correct name for P2O5 is
potassium oxide
dipotassium pentoxide
diphosphorus pentoxide
phosphorus oxide
Molecular formula mass = 192
MF =
Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.60% H, and 51.12% O. What is the molecular formula for glycerol?
C2H3O2
CH2O
C2H4O2
C3H8O3
