Limiting Reactants + Percent Yield
Balance the following chemical equation:
C10H14 + O2 --> CO2 + H2O
2 C10H14 + 27 O2 --> 20 CO2 + 14 H2O
Which of the following is not a property predicted based on the Kinetic Molecular Theory?
A) It explains the low density of gases in comparison to solids and liquids.
B) It predicts a gasʹs tendency to assume the shape and volume of the container.
C) It explains why gases are compressible.
D) It predicts a gasʹs tendency to have high melting and boiling points.
E) It explains how the molecules slow down as temperature is decreased.
D) It predicts a gasʹ tendency to have high melting and boiling points.
If the pressure of a constant amount of gas at constant temperature is increased by threefold, what happens to its volume?
The volume is one-third of the original volume.
Which of the following aqueous solutions would be expected to have the lowest osmotic pressure?
a) 1 M C6H12O6
b) 1 M CH4O
c) 1 M KNO3
d) 1 M CaCl2
e) 1 M NaCl
What is the volume (ml) of a 12.0 M HCl solution that contains 3.60 moles of HCl?
300. mL
Calcium oxide reacts in a combination reaction to produce calcium hydroxide. In a particular experiment, a 4.50 g sample of CaO is reacted with excess water and 4.50 g of Ca(OH)2 is recovered. What is the percent yield in this experiment?
(CaO = 56.08 g/mol, H2O is 18.01 g/mol, and Ca(OH)2 is 74.09 g/mol)
CaO + H2O --> Ca(OH)2
75.7 %
A gas mixture contains O2 and Ne. If O2 has a partial pressure of 766 torr and Ne has a partial pressure of 0.88 atm, what is the total pressure of this mixture in atm?
1.89 atm
A gas exerts a pressure of 685 mmHg and has a temperature of 245 K. What is the new pressure of this gas, in mmHg, if the temperature is increased to 655 K? Volume and the amount of the gas stay constant.
1830 mmHg
The solubility of KI is 50 g in 100 g of H2O at 20 °C. If 110 grams of KI are added to 200 grams of H2O,
A) all of the KI will dissolve.
B) the solution will freeze.
C) the solution will start boiling.
D) a saturated solution will form.
E) the solution will be unsaturated.
D) a saturated solution will form.
What volume (mL) of a 10.5 M solution of sodium hydroxide (NaOH) must be diluted to prepare a 200. mL solution of 1.75 M sodium hydroxide?
33.3 ml
How many liters of O2 are needed to react completely with 56.0 L of CH4 at STP to produce CO2 and H2O?
CH4 + 2O2 --> CO2 + 2 H2O
112 L
What is the pressure (in atm) of 0.133 moles of NH3 gas found in a 7.50 L container at a temperature of -6.00 C?
K = C + 273.15
R = 0.0821
0.389 atm
A quantity of Ne gas that was originally held at 3.80 atm pressure in a 1.00 L container at 26.0 °C is transferred to a 10.0 L container at 20.0 °C. What is the pressure (in atm) of Ne in the new container?
0.372 atm
Based on the solubility guidelines, which of the following cations would form a precipitate in water with phosphate anion, but not with chloride anion?
A) Rb+
B) NH4+
C) Pb2+
D) K+
E) Ba2+
E) Ba2+
How many grams of CaCl2 would one need to dissolve in sufficient water to make a 500. mL solution with a molarity of 0.120 M? (CaCl2 is 110.984 g/mol)
6.66 g of CaCl2
What is the mass of water produced when 8.23 g of C4H10 reacts with 35.7 g of O2 in the following reaction:
2 C4H10 + 13O2 --> 10H2O + 8CO2
C4H10 = 58.12 g/mol O2 = 32.00 g/mol
H2O = 18.02 g/mol
12.8 grams of H2O
I have 2.7 moles of a gas being held in a 2200 milliliter container at 820 torr. What temperature will this gas be inside of this container?
1 atm = 760 torr
R = 0.0821
10.7 K
I have a gas being held in a flexible container at 750 torr, and at a temperature of 20 C. If I lower the temperature to 5 C and raise the pressure to 770 torr, resulting in a volume of 23 L, what was my initial volume?
24.9 L of gas
Which pair of compounds will form a solution?
A) Na2SO4 and benzene (C6H6)
B) H2O and CCl4
C) Benzene (C6H6) and hexane (C6H14)
D) NaCl and hexane (C6H14)
E) More than one of the combinations will form solutions.
C) Benzene (C6H6) and hexane (C6H14)
According to the reaction given below, how many grams of solid Fe(OH)2 is formed when 175 mL of 2.27 M aqueous LiOH reacts with excess aqueous FeCl2? (Note: Molar Mass of Fe(OH)2 is 89.859 g/mol)
FeCl2(aq) + 2 LiOH(aq) → Fe(OH)2(s) + 2 LiCl(aq)
17.8 g