A researcher wants to determine the concentration of beta-carotene in carrots. She obtains a 0.677 M stock solution of beta-carotene and creates Dilution A by transferring 25.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 94.00 mL. She creates Dilution B by transferring 50.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 83.00 mL. She creates Dilution C by transferring 6.00 mL of Dilution B into a new container and diluting it with solvent to a final volume of 21.00 mL. She measures the absorbance of each solution and obtains the values below. Plot the data in a spreadsheet software and determine the best-fit line. What is the slope of the best-fit line? Report answer with three places after the decimal. Solution Absorbance Stock solution 0.844 Dilution A 0.140 Dilution B 0.463 Dilution C 0.223
A researcher wants to determine the concentration of beta-carotene in carrots. She obtains a 0.677 M stock solution of beta-carotene and creates Dilution A by transferring 25.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 94.00 mL. She creates Dilution B by transferring 50.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 83.00 mL. She creates Dilution C by transferring 6.00 mL of Dilution B into a new container and diluting it with solvent to a final volume of 21.00 mL. She measures the absorbance of each solution and obtains the values below. Plot the data in a spreadsheet software and determine the best-fit line. What is the slope of the best-fit line? Report answer with three places after the decimal.
| Solution | Absorbance |
| Stock solution | 0.844 |
| Dilution A | 0.140 |
| Dilution B | 0.463 |
| Dilution C | 0.223 |
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