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Dinitrogen pentoxide (N2O5) decomposes as follows to nitrogen dioxide and nitrogen trioxide:N2​O5​(g)NO2​(g)+NO3​(g)Calculate the average rate of the reaction between consecutive measurement times in the following table. Time (s)[N2O5] (molecules/cm3) 0.001.105×1012  1.95 1.040×1012 3.90 9.93×1011 5.85 9.58×1011 7.80 9.33×1011  Express every answer to two significant figures.Rate 1 =     molecules/(cm3·s)    Rate 2 =    molecules/(cm3·s)     Rate 3 =    molecules/(cm3·s)   Rate 4 =    molecules/(cm3·s)

Question

 

Dinitrogen pentoxide (N2O5) decomposes as follows to nitrogen dioxide and nitrogen trioxide:

N2​O5​(g)NO2​(g)+NO3​(g)

Calculate the average rate of the reaction between consecutive measurement times in the following table. 
Time (s) [N2O5] (molecules/cm3)
 0.00 1.105×1012 
 1.95  1.040×1012 
3.90  9.93×1011 
5.85  9.58×1011 
7.80  9.33×1011 
 
Express every answer to two significant figures.
Rate 1 =     molecules/(cm3·s)   
 
Rate 2 =    molecules/(cm3·s)   
 
 
Rate 3 =    molecules/(cm3·s) 
 
 
Rate 4 =    molecules/(cm3·s)   
check_circleAnswer
Step 1

Rate of reaction is calculated using the given formula,

Rate of decomposition reaction=-changein concentration
Δt
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Rate of decomposition reaction=-changein concentration Δt

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Step 2

Rate 1 is calculated as shown,

Rate of decomposition reaction =-changein concentration
Δt
Ifinal
linitial
1.95-0.0
1.040x1012-1.105x1012 |molecules/cm3
1.95(sec)
0.065 molecules/cm3
1.95(sec)
Rate 1 0.0333 mole cules/cm3.sec
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Rate of decomposition reaction =-changein concentration Δt Ifinal linitial 1.95-0.0 1.040x1012-1.105x1012 |molecules/cm3 1.95(sec) 0.065 molecules/cm3 1.95(sec) Rate 1 0.0333 mole cules/cm3.sec

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Step 3

Rate 2 is calculate...

Rate of decomposition reaction=_changein concentration
Δt
NinaNiial
final
ini tial
3.90-1.95
9.93x1011-10.40x1011 molecules/cm3
1.95(sec)
0.47molecules/cm3
1.95(sec)
Rate 2 0.241 molecules/cm3.se
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Rate of decomposition reaction=_changein concentration Δt NinaNiial final ini tial 3.90-1.95 9.93x1011-10.40x1011 molecules/cm3 1.95(sec) 0.47molecules/cm3 1.95(sec) Rate 2 0.241 molecules/cm3.se

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