hard · MCAT chem-phys
A myoglobin solution in a 1.00-cm cuvette has absorbance 0.80 at 410 nm. A researcher dilutes the sample so its concentration is one-quarter of the original, then measures it in a 2.00-cm cuvette.
Assuming Beer's law holds and that the same fraction of stray light (set aside as negligible) applies, what fraction of the incident 410-nm light is transmitted by the diluted sample?
- About 79% (the transmittance rises because the path length increase outweighs the dilution)
- About 63% (a net absorbance of 0.20, reflecting the quarter-concentration over double the path)
- About 40% (a net absorbance of 0.40, since dilution and path length both lower absorbance)
- About 6.3% (the diluted absorbance of 0.20 applied to the original transmittance of 16%)
Sign up free to see the explanation and track your rank →
More MCAT chem-phys practice
- Which term describes the final state where no net heat flow occurs?
- What term describes the molecule with internal symmetry despite having chiral centers?
- An infrared (IR) spectrum of an unknown organic compound sho… — Which functional group is
- What is the molecular mechanism by which the catalyst achieves this increase?
- Which mechanism is occurring?
- A researcher discovers that a population of bacteria survives exposure to an antibiotic be
- According to the Critical Analysis and Reasoning Skills (CARS) methodology, which test sho
- Which reactant is the limiting reagent?