Question

Calculate the following conversion using the correct significant digits in your answer (1 Cal = 4.184 kJ):

275.3 kJ = ______ Cal

Answer 1

To convert 275.3 kJ to Calories, divide by the conversion factor of 4.184 kJ per Cal, resulting in 65.8 Cal. The result has the same number of significant digits as the given value.

Step-by-step explanation:

To calculate the conversion from kilojoules (kJ) to Calories (Cal), we use the fact that 1 Cal is equal to 4.184 kJ. Using the value of 275.3 kJ, we simply divide by 4.184 kJ/Cal:

275.3 kJ × (1 Cal / 4.184 kJ) = 65.8 Cal

The answer must be expressed with the correct number of significant digits. Since the given value has four significant digits and the conversion factor is defined as exactly 4.184, the result should also have four significant digits. Therefore, 275.3 kJ is equal to 65.8 Cal.