Question

A candy bar has a total mass of 75.0 grams. In a calorimetry experiment, a 1.0-g sample of this candy bar was burned in a calorimeter surrounded by 1000g of water. The temperature of the water in contact with the burning candy bar was measured and found to increase from an initial temperature of 21.2C to a final temperature of 24.3C.
a. Calculate the amount of heat in calories release when the 1.0-g sample burned.
b. Convert the heat in calories to nutritional Calories and then calculate the energy content (fuel value) in Cal/g.
c. Calculate the total caloric content of the candy bar in Calories.

Answer 1

A new element, Albanesium, has been discovered.  43.22% of all naturally occurring Albanesium has a mass of 292.0 amu.  46.83% of all Albanesium has a mass of 293.05 amu.  The rest of the Albanesium has a mass of 295.045 amu.  Find the average atomic mass of Albanesium.  Report to 4 significant figures