how do I calculate rate velocity using

absorbence at 412/ min-1.

To calculate rate velocity using absorbance at 412 nm (nanometers) per minute, you first need to have the change in absorbance over a specific time period. The equation to calculate rate velocity is:

Rate Velocity = (Change in Absorbance) / (Time)

Here are the steps to calculate rate velocity:

Step 1: Measure the initial absorbance value (A1) at 412 nm.

Step 2: Measure the final absorbance value (A2) at 412 nm after a specific time interval.

Step 3: Calculate the change in absorbance by subtracting A1 from A2:

Change in Absorbance = A2 - A1

Step 4: Determine the time interval Δt (in minutes) over which the change in absorbance occurred.

Step 5: Divide the change in absorbance by the time interval to find the rate velocity:

Rate Velocity = (Change in Absorbance) / (Δt)

Make sure to use consistent units throughout the calculations, specifically for the absorbance values and the time interval.