11. For each of the following amounts, calculate the mass of the sample:
a) 5.32 mol barium iodide, Balz
b) 17.8 mol sulfur dioxide, SO2
c) 1.25 mol AspirinTM, CHO4
d) 0.234 mol magnesium nitrite, Mg(NO2)2

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.

it's c (engineer's do their work with mechanical stuff not on any living being)