A student increases the temperature of a 400 cm3 balloon from 30°C to 90°C. What should the new volume of the balloon be?
(Points: 5)
133 cm3
334 cm3
479 cm3
1,200 cm3
2. Which of the following is true about a carbonated soft drink?
(Points: 5)
The carbon dioxide is the solvent, and water is the solute.
The water is the solution, and carbon dioxide is the solvent.
The carbon dioxide is the solution, and the water is the solvent.
The water is the solvent, and the carbon dioxide is the solute.
3. For the reaction CH3COOH CH3COO + H+, which of the following statements is true?
(Points: 5)
CH3COOH is a Brønsted-Lowry acid.
CH3COO is an Arrhenius base.
CH3COO is a Lewis base.
CH3COOH is a Brønsted-Lowry base.
4. Which of the following is an exothermic reaction?
(Points: 5)
condensing steam
dissolving ammonium nitrate in water
melting ice
dissolving sugar in water
13. If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have after 42 days?
(Points: 5)
3.13 g
6.25 g
1.25 g
2.50 g
14. A solution has a hydrogen ion (or hydronium ion) concentration of 3.16 × 109 M. What is the pH of the solution?
(Points: 5)
8.5
8.0
8.0
8.5
15. Which of the following reactions occurs at the anode in a voltaic cell?
(Points: 5)
Mg (s) Mg2+ + 2e
K+ (aq) + e K (s)
Cd2+ (aq) + Zn (s) Zn2+ (aq) + Cd (s)
Cu2+ (aq) + 2e Cu (s)
16. A reaction requires 22.4 L of gas at STP. You have 45.0 L of gas at 100 kPa and 373 K. Which of the following statements is true? The gas constant is 8.31 L-kPa/mol-K.
(Points: 5)
You will have too much gas for the reaction to occur.
You do not have enough gas for the reaction to occur.
You cannot tell given this information.
You will have an excess of gas and the reaction will occur.
17. A 3.0 L container holds a sample of hydrogen gas at 300 K and 100 kPa. If the pressure increases to 300 kPa and the volume remains constant, what will the temperature be?
(Points: 5)
100 K
300 K
600 K
900 K
18. Which of the following is a correctly written thermochemical equation?
(Points: 5)
C5H12 (g) + 8O2 (g) 5CO2 (g) + 6H2O (l), H = 3,536.1 kJ/mol
NH4Cl NH4+ +Cl
2C8H18 + 25O2 16CO2+ 18H2O, H = 5,471 kJ/mol
C3H8 (g) + O2 (g) CO2 (g) + H2O (l), H = 2,220 kJ/mol
19. By doing which of the following will you decrease the number of collisions and energy of reactant molecules?
(Points: 5)
decreasing the concentration of reactants
adding a catalyst
increasing the pressure of the reactant mixture
decreasing the temperature of the reactant mixture
20. For the reaction NH4Cl (s) NH3 (g) + HCl (g) at 25°C, H = 176 kJ/mol and S = 0.285 kJ/(mol-K). What is the G, and will this reaction be spontaneous in the forward direction?
(Points: 5)
91 kJ/mol, yes
91 kJ/mol, yes
169 kJ/mol, no
91 kJ/mol, no
(Points: 5)
133 cm3
334 cm3
479 cm3
1,200 cm3
2. Which of the following is true about a carbonated soft drink?
(Points: 5)
The carbon dioxide is the solvent, and water is the solute.
The water is the solution, and carbon dioxide is the solvent.
The carbon dioxide is the solution, and the water is the solvent.
The water is the solvent, and the carbon dioxide is the solute.
3. For the reaction CH3COOH CH3COO + H+, which of the following statements is true?
(Points: 5)
CH3COOH is a Brønsted-Lowry acid.
CH3COO is an Arrhenius base.
CH3COO is a Lewis base.
CH3COOH is a Brønsted-Lowry base.
4. Which of the following is an exothermic reaction?
(Points: 5)
condensing steam
dissolving ammonium nitrate in water
melting ice
dissolving sugar in water
13. If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have after 42 days?
(Points: 5)
3.13 g
6.25 g
1.25 g
2.50 g
14. A solution has a hydrogen ion (or hydronium ion) concentration of 3.16 × 109 M. What is the pH of the solution?
(Points: 5)
8.5
8.0
8.0
8.5
15. Which of the following reactions occurs at the anode in a voltaic cell?
(Points: 5)
Mg (s) Mg2+ + 2e
K+ (aq) + e K (s)
Cd2+ (aq) + Zn (s) Zn2+ (aq) + Cd (s)
Cu2+ (aq) + 2e Cu (s)
16. A reaction requires 22.4 L of gas at STP. You have 45.0 L of gas at 100 kPa and 373 K. Which of the following statements is true? The gas constant is 8.31 L-kPa/mol-K.
(Points: 5)
You will have too much gas for the reaction to occur.
You do not have enough gas for the reaction to occur.
You cannot tell given this information.
You will have an excess of gas and the reaction will occur.
17. A 3.0 L container holds a sample of hydrogen gas at 300 K and 100 kPa. If the pressure increases to 300 kPa and the volume remains constant, what will the temperature be?
(Points: 5)
100 K
300 K
600 K
900 K
18. Which of the following is a correctly written thermochemical equation?
(Points: 5)
C5H12 (g) + 8O2 (g) 5CO2 (g) + 6H2O (l), H = 3,536.1 kJ/mol
NH4Cl NH4+ +Cl
2C8H18 + 25O2 16CO2+ 18H2O, H = 5,471 kJ/mol
C3H8 (g) + O2 (g) CO2 (g) + H2O (l), H = 2,220 kJ/mol
19. By doing which of the following will you decrease the number of collisions and energy of reactant molecules?
(Points: 5)
decreasing the concentration of reactants
adding a catalyst
increasing the pressure of the reactant mixture
decreasing the temperature of the reactant mixture
20. For the reaction NH4Cl (s) NH3 (g) + HCl (g) at 25°C, H = 176 kJ/mol and S = 0.285 kJ/(mol-K). What is the G, and will this reaction be spontaneous in the forward direction?
(Points: 5)
91 kJ/mol, yes
91 kJ/mol, yes
169 kJ/mol, no
91 kJ/mol, no
Honestly, I think it would've been easier to just work these out than to copy it all onto here......