You prepare 25.00 mL of a standard solution containing 10.2 mg of n-butanol as internal standard and 13 mg of isobutanol as analyte. The density of this solution is 0.937 g/mL. You perform a GC experiment. The integrated signal response in this standard is 0.361 for n-butanol and 0.644 for the isobutanol. What is the response factor? State your answer using the correct number of significant figures.