Question

In a first order decomposition, the constant is 0.00354 sec-1. What percentage of the compound has...

In a first order decomposition, the constant is 0.00354 sec-1. What percentage of the compound has decomposed after 43.3 seconds?
Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

t1/2   = 0.693/k

         = 0.693/0.00354

           =195.76sec

t   = 43.3sec

K   = 2.303/t log[A]/[A0]

0.00354 = 2.303/43.3log100/x

log100/x     = 0.00354*43.3/2.303

log(100/x)    = 0.0665

   100/x     = 10^0.0665

100/x       = 1.165

x             = 100/1.165 = 85.83

               = 85.83%

decomposition = 100-85.83   = 14.17%

no of half lives = total time/half life time

                       = 43.3/

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1) The decomposition of compound A is first order with an activation energy of 52.3 kJ...
1) The decomposition of compound A is first order with an activation energy of 52.3 kJ mol-1. If 10% of A is decomposed in 10 minutes at 10 ℃ show that after 20 minutes at 20 ℃, the proportion of A decomposed will be 36.2%.
The rate constant for the first-order decomposition of a compound A in the reaction 2 A...
The rate constant for the first-order decomposition of a compound A in the reaction 2 A  P is k, =3.56 x 10-7 s-1 at 25°C. What is the half-life of A? What will be the pressure, initially 33.0 kPa at (a) 50 s, (b) 20 min, (c) 20 h after initiation of the reaction?
The decomposition of a compound in a first-order solution, with an activation energy of 52.3 kJ...
The decomposition of a compound in a first-order solution, with an activation energy of 52.3 kJ mol-1. A solution with 10% A decomposes 10% in 10 min at 10 ° C. What percentage of decomposition can be found with a 20% solution after 20 min at 20 ° C? Answer: 36.21%
in a first order decomposition reaction, 50.0% of a compound decomposes in 15.0 min (a) what...
in a first order decomposition reaction, 50.0% of a compound decomposes in 15.0 min (a) what is the rate constant of the reaction? (b) how long does it take for 75.0% of the compound to decompose
The decomposition of H2O2 is of first order and it has constant speed of 7.30 x...
The decomposition of H2O2 is of first order and it has constant speed of 7.30 x 10^-4 s^-1. If the initial concentration of H2O2 is 0.115M, determine the concentration at 60 seconds. a) .071M b) .110M c) .120M d) .114M
The first order constant is 4.82 x 10-3 s-1 at 70C for the decomposition of the...
The first order constant is 4.82 x 10-3 s-1 at 70C for the decomposition of the following reaction: 2N2O5 (g) -> 4NO2 + O2 (g) Suppose that you start with .0175M of N2O5 (g) a.) What is the molarity of N2O5 that remains after 15 minutes (note: the rate constant is in seconds) b.) How many seconds will it take for the quantity of N2O5 to drop to .015M? c.) What is the half life of N2O5 at 70C?
The first-order decomposition of N2O at a fixed temperature has a rate constant of 0.385 s-1....
The first-order decomposition of N2O at a fixed temperature has a rate constant of 0.385 s-1. If the initial concentration of N2O is 21.4 M, what is the concentration of N2O after 50 s?
The decomposition of sulfuryl chloride (SO2Cl2) is a first order process. The rate constant at 660...
The decomposition of sulfuryl chloride (SO2Cl2) is a first order process. The rate constant at 660 K is 4.5 x 10-2s-1. a) If the initial pressure of sulfuryl chloride is 375 torr, what is the pressure of the substance after 65 sec? b) At what time will the pressure of sulfuryl chloride decline to one tenth of its original value?
The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition...
The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5×10−2s−1. If we begin with an initial SO2Cl2 pressure of 450 torr , what is the partial pressure of this substance after 68 s? At what time will the partial pressure of SO2Cl2 decline to one-third its initial value?
The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.44×10−4...
The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.44×10−4 s−1 at a certain temperature. If the initial concentration of SO2Cl2 is 1.00 M, how long will it take for the concentration to decrease to 0.72 M ? If the initial concentration of SO2Cl2 is 0.175 M , what is the concentration of SO2Cl2 after 460 s?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT