Question

For a certain reaction the rate
K= (NO2)²(O2), when the initial
Concentration of NO and O2 is doubled.
the initial rate is how much?
​

Answer 1

Answer:

1.

The combustion of ethane (C2H6) is represented by the equation:

2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l)

In this reaction:

(a) the rate of consumption of ethane is seven times faster than the rate of consumption of oxygen.

(b) the rate of formation of CO2 equals the rate of formation of water.

(c) water is formed at a rate equal to two-thirds the rate of formation of CO2.

(d) the rate of consumption of oxygen equals the rate of consumption of water.

(e) CO2 is formed twice as fast as ethane is consumed.

2.

The speed of a chemical reaction

(a) is constant no matter what the temperature is.

(b) is independent of the amount of contact surface of a solid involved.

(c) between gases should in all cases be extremely rapid because the average kinetic energy of the molecules is great.

(d) between ions in aqueous solution is extremely rapid because there are no bonds that need to be broken.

(e) varies inversely with the absolute temperature.

3.

For a reaction 2A + B 2C, with the rate equation: Rate = k[A]2[B]

(a) the order with respect to A is 1 and the order overall is 1.

(b) the order with respect to A is 2 and the order overall is 2.

(c) the order with respect to A is 2 and the order overall is 3.

(d) the order with respect to B is 2 and the order overall is 2.

(e) the order with respect to B is 2 and the order overall is 3.

4.

Given the following data for this reaction:

NH4+(aq) + NO2-(aq) N2(g) + 2H2O(l)

EXPT

[NH4+]

[NO2-]

RATE

1

0.010 M 0.020 M 0.020 M/s

2

0.015 M 0.020 M 0.030 M/s

3

0.010 M 0.010 M 0.005 M/s

The rate law for the reaction is:

(a) Rate = k[NH4+][NO2-]

(b) Rate = k[NH4+]2[NO2-]2

(c) Rate = k[NH4+]2[NO2-]

(d) Rate = k[NH4+][NO2-]2

(e) none of the above

5.