No, the concentration of the plant extract will not be the same if the volume decreases from 500 microliters to 100 microliters while keeping the initial concentration constant at 30 mg/ml.

To calculate the new concentration after the volume change, you can use the formula for concentration:

C1 * V1 = C2 * V2

Where: C1 = initial concentration (30 mg/ml) V1 = initial volume (500 microliters) C2 = final concentration (unknown) V2 = final volume (100 microliters)

30 mg/ml * 500 microliters = C2 * 100 microliters

C2 = (30 mg/ml * 500 microliters) / 100 microliters

C2 = 15000 mg/ml / 100 microliters

C2 = 150 mg/ml

So, when the volume decreases from 500 microliters to 100 microliters while maintaining the initial concentration of 30 mg/ml, the new concentration will be 150 mg/ml.

NOTE= "If there were no physical factors involved, or you can prepare a fresh solution."