How many kilojoules of energy are in a donut that contains 200.0 Calories?
This sounds like a homework problem. So, I am not going to do if for you. Instead, I am going to suggest that you try looking at a conversion table in your textbook. That should tell you how many joules there are in a calorie. However, I will give you one caution here. I noted that you capitalized Calories. This is consistent with the fact that you are asking about a donut. So, you should keep in mind a convention. When Calories is capitalized (as should be done when talking about the energy content of food) then we are really dealing with kilocalories (1,000’s of calories). So, when dealing with the numbers on the conversion table, make sure as to whether the conversion is for Calories or calories.