Question

I don't think this is that complicated. I am just not sure.
"For the reaction A = products
time and concentration data were collected...

Answer 1

the instantaneous rate is the first derivative to the curve, which is really just the slope at that point. Notice they drew a tangent (in yellow) to the curve at that point, so just find the slope of that line.

\(rate=\dfrac{0.16M-0.48M}{93s-0s}=-0.0034408~M/s\)

note that it's negative because it's in terms of [A].

Answer 2

They want the positive value because they're asking for the rate of the reaction not the consumption of A.

Answer 3

Thanks! I was not sure what points to use. But you use the ends of the graph.

Answer 4

no problem! yeah i went with that because it's the easiest, but you can take any points along the line, it'll give you the same value.