Candy 2 Candy 1 Hershey's Candy 3 Skittles Total 19.555 8.16g 38.35g 10.2.18 10.24g 19.65g = 4.91 100 Candy Type of Candy Number of each Candy Mass Average Mass Total mass of candy Total number of candy Percent Abundance (%) of each Candy #of each x 100) Relative Abundance Number of candy Total number of Candy Relative Mass (Relative abundance x Average mass) Weighted Average Mass (Average Atomic Mass) (Relative Massandy1 + Relative Masscandy? + Relative Masscandya) 0.853 2 0.5 =0.820 - 0.820amu + 0.427am +

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

they are all solids.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )