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WorksheetsBM3 REVIEW
Total questions: 20
Worksheet time: 5hrs 31mins
Al2O3
Aluminum
Oxygen
Aluminum (III) Oxide
Aluminum Oxide
2Al2O3 yields 4Al + 3O2
The mole ratio of Al2O3 to O2 is:
2:3
3:2
4:3
3:4
The limiting reagent is
left over after the reaction
entirely consumed in the reaction
lowers the energy of the reaction hill
the reactant with the smallest coefficient out in front
Given the reaction C6H12O6 + 6O2 yields 6CO2 + 6H2O
What is the total number of moles of water produced from 2.5 moles of C6H12O6? (Take your time, 15 min max)
3 moles
10 moles
15 moles
4 moles
When a sample of oxygen gas in a closed container of constant pressure is heated until the temperature is doubled, which of the following is also doubled?
the number of molecules per cm3
the average velocity of the gas
the density of the gas
the volume of the gas
Which of these gases effuses the slowest under the same conditions of temperature? (Graham's Law, which has the greatest mass?)
Ne
NO2
CO2
NH3
STP is
standard temperature and pressure
standard time and percentage
solar timing panels
Start taking propernotes
740 mm Hg is a unit of
temperature
pressure
moles
volume
Standard temperature and a pressure of 0.5 atmospheres are equal to
0 C and 380 torr
0 C and 760 torr
32 C and 380 torr
32 C and 760 torr
Three samples of gas each exert a pressure of 740 mm Hg in separate 2 L containers. What is the total pressure they exert if they are all place in a single 2 L container?
247 mm Hg
1.48 x 103 mm Hg
740 mm Hg
2.22 x 103 mm Hg
What does the constant collision of gas molecules against the inside walls of a container produce?
temperature
pressure
density
diffusion
What is the conversion factor that should be used to determine the number of moles of a gas at STP when you are given the volume of a gas?
6.02 x 1023 / 22.4 L
22.4 L / 6.02 x 1023
22.4 L /1 mol
1 mol / 22.4 L
In Gas Law Problems, all temperatures must be in
Kelvin
Celsius
Fahrenheit
Candelas
Hydrogen gas is collected at a constant temperature. The starting pressure of the sample is 760 mm Hg and a volume of 30 L. If you crush the bottle and decrease the volume to 15L, what is the new pressure in atm?
0.5 atm
2.0 atm
1520 atm
380 atm
A mixture of oxygen, hydrogen and nitrogen gases exerts a total pressure of 278 kPa. If the partial pressures of the oxygen and the hydrogen are 112 kPa and 101 kPa respectively, what would be the partial pressure exerted by the nitrogen.
0.231 atm
0.641 atm
0.725 atm
0.115 atm
As Temperature Increases, the Pressure of a gas increases (Guy-Lussac Law) and
the # of gas particle collisions increases with the walls of the container as the temperature rises
the air particles inside the container decrease their speed because their temperature rises
the atmosphere compresses the container
some of the gas has leaked out
What is the approximate ΔH for the formation of 1 mol of H2O(l)?
2H2(g) + O2(g) yields 2H2O(l)
ΔH = - 571.6 kJ
-571.6 kJ
+571.6 kJ
-285.8 kJ
+285.8 kJ
A potential energy diagram for the following reaction will be:
2H2(g) + O2(g) yields 2H2O (l) ΔH = -571.6 kJ
lower in energy at the end of the reaction coordinate
higher in energy at the end of the reaction coordinate
dipped in the middle
a flat line
Which of the following statements describes the difference between endothermic and exothermic chemical reactions?
Energy is conserved in endothermic reactions but is not conserved in exothermic reactions.
Endothermic reactions involve changes in the nucleus of an atom, but exothermic reactions do not involve changes in the nucleus.
Energy is absorbed in endothermic reactions but is released in exothermic reactions.
Endothermic reactions occur when electrons are shared between atoms but exothermic reactions occur when electrons are transferred between atoms.
A sample of an ideal gas at 121 C and 1.0 atm has a volume of 1.5 L, how many moles of the gas does the sample contain? PV=nRT (R=0.0821 L atm / mol K)
0.15 mol
2210 mol
2704 mol
0.046 mol
