Test: ACT Science

A spectrophotometer measures specific light wavelengths emitted by a sample. The readings of the samples are compared to those on a standard curve of known values. The standard curve creates a line and the equation of this line can be used to extrapolate the concentration of a given substance in samples whose spectrophotometric measurements fall within range of the curve.

9.

Standard_curve_2

A scientist measures a sample and finds that it has an absorbance of . What is the concentration of substance in this sample?

5.0

5.375

5.5

Cannot be determined

9/12 questions

66%
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