Question

6) A concentration-time study of the gas phase reaction 2 A3 ? 3 A2 produced the data in the table below. Time (s) [A3] (M) [A2] (M) 0 4.00 !! 10?? 0 10 2.00 !! 10?? 3.00 !! 10?? 20 1.00 !! 10?? 4.50 !! 10?? 30 5.00 !! 10?? ? What is the average rate of decomposition of A3 in the time interval 20-30 seconds? A) 5.00 !! 10?? M/s B) 3.50 !! 10?? M/s C) 4.00 !! 10?? M/s D) 4.00 !! 10?? M/s 7) Hydrogen peroxide decomposes to water and oxygen according to the reaction below: 2 H2O2(aq) ? 2 H2O(l) + O2(g) In the presence of large excesses of I? ion, the following set of data is obtained. What is the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction if 1.00 L of H2O2 reacts at 25°C and 1.00 atm pressure? Time (s) | O2 (g) Collected (mL) 0.0 | 0.0 45.0 | 2.00 90.0 | 4.00 135.0 | 6.00 A) 9.09 !! 10?? M/s B) 1.64 !! 10?? M/s C) 4.33 !! 10?? M/s D) 3.63 !! 10?? M/s

          6) A concentration-time study of the gas phase reaction 2 A3 ? 3 A2 produced the data in the table below.

Time (s) [A3] (M) [A2] (M)
0 4.00 !! 10?? 0
10 2.00 !! 10?? 3.00 !! 10??
20 1.00 !! 10?? 4.50 !! 10??
30 5.00 !! 10?? ?

What is the average rate of decomposition of A3 in the time interval 20-30 seconds?
A) 5.00 !! 10?? M/s B) 3.50 !! 10?? M/s C) 4.00 !! 10?? M/s D) 4.00 !! 10?? M/s

7) Hydrogen peroxide decomposes to water and oxygen according to the reaction below:
2 H2O2(aq) ? 2 H2O(l) + O2(g)

In the presence of large excesses of I? ion, the following set of data is obtained. What is the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction if 1.00 L of H2O2 reacts at 25°C and 1.00 atm pressure?

Time (s) | O2 (g) Collected (mL)
0.0 | 0.0
45.0 | 2.00
90.0 | 4.00
135.0 | 6.00

A) 9.09 !! 10?? M/s B) 1.64 !! 10?? M/s C) 4.33 !! 10?? M/s D) 3.63 !! 10?? M/s

6) A concentration-time study of the gas phase reaction 2 A3 ? 3 A2 produced the data in the table below.

Time (s) [A3] (M) [A2] (M)
0 4.00 !! 10?? 0
10 2.00 !! 10?? 3.00 !! 10??
20 1.00 !! 10?? 4.50 !! 10??
30 5.00 !! 10?? ?

What is the average rate of decomposition of A3 in the time interval 20-30 seconds?
A) 5.00 !! 10?? M/s B) 3.50 !! 10?? M/s C) 4.00 !! 10?? M/s D) 4.00 !! 10?? M/s

7) Hydrogen peroxide decomposes to water and oxygen according to the reaction below:
2 H2O2(aq) ? 2 H2O(l) + O2(g)

In the presence of large excesses of I? ion, the following set of data is obtained. What is the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction if 1.00 L of H2O2 reacts at 25°C and 1.00 atm pressure?

Time (s) | O2 (g) Collected (mL)
0.0 | 0.0
45.0 | 2.00
90.0 | 4.00
135.0 | 6.00

A) 9.09 !! 10?? M/s B) 1.64 !! 10?? M/s C) 4.33 !! 10?? M/s D) 3.63 !! 10?? M/s

Added by Diana C.

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