Zinc chloride (ZnCl2) is 52.02% chlorine by mass. What mass of chlorine is contained in
83.8 g of ZnCl2?
Answer in units of g.

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.

catya that's not even a b or c

im doing test rn im going with 2 but ill give answer if itss wrong,   : )