What is the mass of rock candy if a 1000 grams of sucrose is boiled and cooled at 20 degrees Celsius?

The mass of rock candy formed from 1000 grams of sucrose will be approximately equal to the initial mass of sucrose, assuming no significant losses occur during the boiling and cooling process. However, due to factors like evaporation or crystallization efficiency, the final mass may be slightly less than 1000 grams. Typically, the yield is close to the initial mass if the process is done carefully. Therefore, you can expect the mass of the rock candy to be around 900 to 1000 grams.