Question

This graph shows the concentration of the reactant A in the reaction A→B.

Determine the average rate of the reaction between 0 and 10 seconds.

Answer 1

0.007 M/s
0.014 M/s
0.86 M/s
0.07 M/s

Answer 2

i know that this one is first order

Answer 3

rate=k[A]

Answer 4

The average rate is simple, just add the individual rates and divide by the time

Answer 5

where do i get the rates

Answer 6

would it be (.86-1)/(10-0) which would give me .014

Answer 7

these are the rates
0.007 M/s
0.014 M/s
0.86 M/s
0.07 M/s

is there time associated with them? (i havent opened the file, i dont download word documents off the internet)

Answer 8

its just the graph from react concentration versus time for the first order reaction

Answer 9

yes there are time. so i add all of them up and divide by 10

Answer 10

so, 0.07 M/s was the rate for how long?

Answer 11

i mean, if you have 10 measurements (1 every second), then you divide by 10 seconds. But it doesn't seem like you have 10 measurements

Answer 12

.007 looks like for about 1 second

Answer 13

http://session.masteringchemistry.com/problemAsset/1616822/3/TroAMA3.ch13.p1.jpg

Answer 14

hm what you can do in this scenario is take the end points, then just find the slope.

Answer 15

so we could use .77-.86 /20-10

Answer 16

well do you need the rate between 0 and 10 seconds or 10 to 20 seconds?

Answer 17

i think the answer is .86

Answer 18

( .86-1) /10-0
.14/10
=.014

Answer 19

yep that looks right.

Answer 20

thank you once more and that was my last question

Answer 21

i got an 98 thank you so much and for the knowledge i can use on the test.

Answer 22

great! no problem, glad i could help