1. The reaction rate is equal to the _____ in the concentration of reactants or the _____ in the concentration of products.
A) decrease, increase
B) increase, decrease
C) decrease, decrease
D) increase, increase
2. One 2.0 L flask contains 2.0 mol of H2 gas and 1.0 mol of O2 gas. A second flask contains 1.0 mol of H2 gas and 0.500 mol of O2 gas. If both flasks are at the same temperature and pressure, which reaction proceeds faster?
A) Flask 2
B) Flask 1
C) Both reactions proceed at the same rate.
3. 4.0 mol of N2 and 2.0 mol of O2 gas are placed in a 500. mL round bottom flask. The reaction rate of the chemical reaction is calculated at 25.0 °C. If the flask was placed into an ice bath and the temperature of the flask dropped to 5.0 °C, the reaction rate would _____.
A) increase
B) decrease
C) Not enough information given to answer the question
4. For the following reaction what is the affect on the reaction rate of increasing the pressure: N2 +2O2 ---> N2O4
A) rate increases
B) rate decreases
C) rate remains the same
D) Not enough information given to answer the question
5. The addition of a catalyst to a chemical reaction _____ the reaction rate.
A) increases
B) decreases
C) has no affect on
6. If the concentrations of the reactants are known then the reaction rate can be computed.
A) True
B) False
7. A flask contains 3.0 mol of H2 and 1 mol N2 gas, which reacts as shown below. 3H2 + N2 ---> 2NH3 If 2.0 mol of H2 is added to the flask, the reaction rate will _____.
A) decrease
B) increase
C) stay the same
D) Not enough information given to answer the question
8. Increasing the temperature of a reaction _____ the reaction rate.
A) increases
B) decreases
C) no change
9. The following reaction occurs at 1.0 atm. N2 + 2O2 ---> N2O4 What affect would dropping the pressure of the system to 0.5 atm have on the reaction rate?
A) rate increases
B) rate decreases
C) rate remains the same
D) Not enough information given to answer the question
10. Catalysts position molecules in a way that allows them to lock into other molecules providing the necessary orientation needed for a chemical reaction to take place.
A) True
B) False
A) decrease, increase
B) increase, decrease
C) decrease, decrease
D) increase, increase
2. One 2.0 L flask contains 2.0 mol of H2 gas and 1.0 mol of O2 gas. A second flask contains 1.0 mol of H2 gas and 0.500 mol of O2 gas. If both flasks are at the same temperature and pressure, which reaction proceeds faster?
A) Flask 2
B) Flask 1
C) Both reactions proceed at the same rate.
3. 4.0 mol of N2 and 2.0 mol of O2 gas are placed in a 500. mL round bottom flask. The reaction rate of the chemical reaction is calculated at 25.0 °C. If the flask was placed into an ice bath and the temperature of the flask dropped to 5.0 °C, the reaction rate would _____.
A) increase
B) decrease
C) Not enough information given to answer the question
4. For the following reaction what is the affect on the reaction rate of increasing the pressure: N2 +2O2 ---> N2O4
A) rate increases
B) rate decreases
C) rate remains the same
D) Not enough information given to answer the question
5. The addition of a catalyst to a chemical reaction _____ the reaction rate.
A) increases
B) decreases
C) has no affect on
6. If the concentrations of the reactants are known then the reaction rate can be computed.
A) True
B) False
7. A flask contains 3.0 mol of H2 and 1 mol N2 gas, which reacts as shown below. 3H2 + N2 ---> 2NH3 If 2.0 mol of H2 is added to the flask, the reaction rate will _____.
A) decrease
B) increase
C) stay the same
D) Not enough information given to answer the question
8. Increasing the temperature of a reaction _____ the reaction rate.
A) increases
B) decreases
C) no change
9. The following reaction occurs at 1.0 atm. N2 + 2O2 ---> N2O4 What affect would dropping the pressure of the system to 0.5 atm have on the reaction rate?
A) rate increases
B) rate decreases
C) rate remains the same
D) Not enough information given to answer the question
10. Catalysts position molecules in a way that allows them to lock into other molecules providing the necessary orientation needed for a chemical reaction to take place.
A) True
B) False