Convert 7.91 × 10^1 in nutritional Cal to units of kJ. Be sure your answer has the correct number of significant figures.
Note: Reference the Conversion factors for non-SI units table for additional information.
To convert from nutritional calories (Cal) to kilojoules (kJ), we use the conversion factor:
1 Cal = 4.184 kJ
First, we convert 7.91 × 10^1 Cal to regular calories:
7.91 × 10^1 Cal = 7.91 Calories
Now we convert calories to kilojoules:
7.91 Calories × 4.184 kJ/Cal = 33.10684 kJ
Since the original value (7.91 × 10^1 Cal) had 3 significant figures, we need to round our final answer to 3 significant figures. Therefore, the equivalent value of 7.91 × 10^1 Cal in kJ is 33.1 kJ.