It is not possible to determine without more information. What are the units of
ID: 489959 • Letter: I
Question
It is not possible to determine without more information. What are the units of that are consistent with the following rate law? ppm/year year ppm year Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood initially had 1 sox10 how old is it when moles of carbon-14 remain? 11440 years 5720 5556 years 2375 years 0.743 data be to that experimental concentration data to a straight line for order reaction? reactants reactant the decomposition of cyclopropane has a rate constant of 6.7 times 10^-4 If the initial concentration of cyclopropane is 1.33 M, what is the concentration of cyclopropane after 0.43 M 0.15M 0.86 M 094 M 0.6 For a reaction, what generally happens if the temperature is decreased? A decrease in occurs, which results in a faster rate. A decrease in knockouts, which results in a slower rate. An increase in occurs, which results in a faster change with which results in a rate the rate. A reaction is found to have a rate there is no change with k or the rate.Explanation / Answer
Q15
for zero order
we require
Rate = k
so..
the best fit
Concentration vs. time
so choose
[Reactant] vs. which is B
Q16
if 1st order
then
apply:
ln(A) = ln(A0) - kt
so.
ln(A) = ln(1.33) - (6.7*10^-4)(t)
A = exp(ln(1.33) - (6.7*10^-4)(t)) NOTE: Time can't be read, but just inster time in the equation
Q17
If we decrease T, then, we typically decrease the value of "k" which is the rate constant
so this will decrease the overall rate of reaction
so
choose between A and B, since it has "k" decrease
then
choose B, since it will slower the rate
Q18
Apply Ahrrenius eqution
ln(K2/K1) = E/R*(!/t1-1/T2)
ln(7.69/(3.36*10^4) = E/(8.314)*(1/344 - 1/219)
E = ln(7.69/(3.36*10^4)) * 8.314 / (1/344 - 1/219) = 42001.8 J/mol
choose
A
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